Introduction to the special section on contemporary issues in human sexuality: research and practice

Critical issues in human sexuality have changed markedly during the past decade and so have the contributions of psychology to the evaluation and treatment of sexual behavior problems. Some of the greatest challenges facing psychologists today include the increasing emphasis on medical interventions for the male sexual disorders and the relative decline of traditional behavioral sex therapies, the recalcitrance of sexual desire disorders, the prevention of "unsafe" sexual behavior, and the limited understanding of female sexuality. This overview introduces a series of 5 articles that examine these selected critical issues in human sexuality. Guidelines for clinical practice and directions for future research are highlighted.     

Sexual robbery: The missing concept in the search for an appropriate legal metaphor for sexual aggression.

Beginning in the late 1970s and continuing into the early years of the next decade, feminists provided compelling evidence that under the existing rape laws a woman's sexuality was treated as "property" belonging to a man. They emphasized that rape was an aggressive invasion of a person's physical integrity and in 1983 rape was redefined in the Criminal Code as a form of assault. The use of physical assault as a metaphor had the effect of shifting the emphasis of the essence of sexual aggression away from a woman's sexuality as property to the coercive nature of the act. A decade later, the evidence suggests this was an ill-conceived change. Redefining rape as a sexual assault, and measuring the severity of the crime by the level of physical violence, has established the legal and social expectations that the woman must be injured to be a "legitimate" victim. This paper advances the proposition that treating a woman's sexuality as property, as did the old rape law, was correct, and that a more appropriate metaphor is robbery. The metaphor of robbery treats a woman's sexuality as property, but achieves reform by shifting ownership from the domain of a male to the woman herself. Robbery implies the use or threat of force, but, unlike assault, does not require harm to the victim as evidence of the robbery. The theoretical proposition that conceptualizing the essence of sexual aggression as "assault" has failed and that "robbery" may be more appropriate was evaluated by examined every case of sexual assault (n=50), physical assault (n=158) and robbery (n=82) that appeared before the Halifax Law Courts between 1983 and 1988. This legal profile of sexual assault was compared to the alternative profile created by examining every case (n=593) of sexual assault reported to the local sexual assault service during the same time period. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Introduction to the special section: Mental health of lesbians and gay men.

There has been little focus on the mental health of lesbians and gay men in the 2 decades since homosexuality was removed as a diagnostic category from the Diagnostic and Statistical Manual of Mental Disorders (3rd ed.; American Psychiatric Association, 1980). This special section contains articles on research methodology on lesbian and gay mental health; the practice and ethics of sexual orientation conversion therapy; the mental health results of the National Lesbian Health Care Survey; ethnicity and sexual orientation; sexual orientation as a factor in research on eating disorders and body dissatisfaction; and verbal and physical abuse as stressors in the lives of lesbian and gay youths. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of childhood abuse on relapse in a recently homeless substance-dependent veteran population.

The impact of childhood abuse, both childhood sexual abuse (CSA) and childhood physical abuse (CPA), is well documented. Both CSA and CPA have been associated with a number of mental health difficulties, including substance dependence. Though the association between abuse and mental health problems is well documented, what has received little attention is the impact that abuse histories may have on the ability to complete treatment for these problems. This study evaluates the association between abuse and failure to complete treatment due to substance relapse in 70 substance-dependent homeless men served by a Veterans Affairs Domiciliary Residential Rehabilitation and Treatment Program. Demographic and mental health variables were compared with incident rates of sexual and physical abuse as well as with rates of relapse prior to program completion. Contrary to predictions, results found that physical abuse, not sexual abuse, was associated with higher relapse rates. Limitations, implications, and future directions are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Structural relations between borderline personality disorder features and putative etiological correlates.

This study assessed the structural relations between borderline personality disorder (BPD) features and purported etiological correlates. Approximately 5,000 18-year-old nonclinical young adults were screened for BPD features, and 2 cohorts of participants (total N?=?421; approximately one half of whom endorsed significant borderline features) completed the laboratory phase of the study. Measures included self-report and interview-based assessments of BPD psychopathology, personality, psychopathology in biological parents, and childhood physical and sexual abuse. Significant relations between BPD features and purported etiological correlates of BPD were found. A multivariate model that included parental psychopathology, childhood abuse, and personality factors provided an adequate fit to the data and supported the contention that the personality traits disinhibition and negative affectivity underlie BPD features. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Gender-related changes in the avian vasotocin system during ontogeny

The arginine vasotocin (AVT) system of the avian brain includes a sexually dimorphic part that extends from the caudal part of preoptic region through the medial part of the bed nucleus of stria terminalis (BSTm) to the lateral septum. It is composed of the parvocellular neurons located in the BSTm and the dense innervation of the medial preoptic region and lateral septum. In this part of the brain, AVT expression is stronger in males than in females in a few bird species investigated to date. This review focuses on the ontogeny of sexual differences in the vasotocinergic system of two gallinaceous species, domestic chicken and Japanese quail, and on the role of gonadal hormones in organizing during development and maintaining in adulthood these differences. Parvocellular AVT neurons become discernible in the BSTm of males and females during the second half of embryonic development. These cells undergo a profound and irreversible sexual differentiation during ontogenetic development. Recent findings demonstrate a dual role of estrogens in the organization and activation of sex differences in the AVT system. During the embryonic period of ontogeny, estrogens differentiate the AVT system in a sexually dimorphic manner in parallel with the differentiation of sexual behavior, while in adulthood estrogens, locally produced from testosterone in the male brain, activate AVT synthesis in the BSTm. The sexually dimorphic part of the AVT system is sensitive to a number of abiotic factors such as light, temperature, and water availability. It is suggested that sex dimorphic vasotocinergic systems could be implicated in processes of social recognition in various behavioral contexts.     

Male sex pheromone of cockroachEurycotis floridana (walker) (Blattidae,Polyzosteriinae): Role and composition of tergites 2 and 8 secretions

InEurycotis floridana, the male calling behavior is associated with the exposition of epidermal glands located under tergites 2, 7, and 8. 4-Hydroxy-5-methyl-3(2H)-furanone and 4-hydroxy-2,5-dimethyl-3(2H)-furanone were recently identified as the specific components of tergite 7 secretion. Methylene chloride extracts of tergite 7 and its major compound 4-hydroxy-5-methyl-3(2H)-furanone attract the conspecific females at a distance. Methylene chloride extracts of tergite 8 are also attractive at a distance to the females, whereas extracts of tergite 2 had no effect on males and females. Our GC investigations showed the absence of specific compounds in tergite 2 secretions. The GC-MS analyses revealed that the male secretion of the gland under tergite 8 is mainly a mixture of (2R*, 3R*)-butanediol, 1-dodecanol and benzyl 2-hydroxybenzoate. These compounds were tested at different concentrations on their own, or as a mixture. Only (2R*, 3R*)-butanediol and 1-dodecanol were attractive for the females. Their functions, as components of the male sex pheromone, in addition with the two derivatives of the furanone are discussed.     

Transfer, Perception, and Activity of Male Pheromone of Acrolepiopsis assectella with Special Reference to Conspecific Male Sexual Inhibition

In the leek moth, Acrolepiopsis assectella, the male, stimulated by a calling female, produces a sexual pheromone that is active on the female. The male-produced pheromone blend contains eight alkanes previously isolated from the male hair-pencils. We used EAG techniques to study the effect of the pheromone on females reared on leek or on artificial diet and on males reared on leek. The optimal stimulation duration appeared to be 1.6 sec exposure to the pheromone or components. The concentrations tested on the antenna were of the order of 10¹² molecules/cm³. The hair-pencil extract tested was of an estimated concentration of around 10⁹ molecules/cm³. The antennal responses are expressed relative to responses to a standard, amyl acetate, but also as an absolute value. Generally, females reared on artificial diet and males reared on leek responded better than females reared on leek. Of the alkanes tested, those present in hair-pencils gave higher responses, with hexadecane always giving the strongest response. A possible inhibiting activity of male leek moth pheromone on the sexual behavior of conspecific males was investigated. The behavior of sexually stimulated males was observed in the presence of other males, hair-pencil extracts, and different compounds either pure or in a mixture. The experiments established that in this species, male pheromone inhibits wing fluttering duration of conspecific males. This inhibition was obtained not only with fluttering males as a source of pheromone but also with all the alkanes tested. The inhibition was due to hair-pencil chemicals, particularly if these were perceived by olfaction plus contact. Wing fluttering increased the inhibitory activity of male-derived alkanes.     

Morphology and distribution of antennal sensilla in egg parasitoid,Ooencyrtus nezarae (Hymenoptera: Encyrtidae)

Morphology of antennal sensilla and their distribution were investigated in adults of Ooencyrtus nezarae, an egg parasitoid of Riptortus pedestris, using scanning electron microscopy. Male antennae was found to be significantly greater in overall length than female antennae. The antenna of O. nezarae was composed of the radicula, scape, pedicel, funicle and clava in both sexes, with seven types of sensilla identified: sensillum trichodea; s. finger‐like; s. placoidea; s. chaetica; s. basiconica; s. coeloconica, and s. campaniform. They occur in varying number and distribution along the antennae. Two sensillum types were further categorized into additional subtypes, with two subtypes in s. trichodea and three in s. chaetica. Among all characterized sensilla, s. trichodea subtype 1 and s. placoidea were multiporous, indicating that the primary function of these sensilla is olfactory. Sensillum trichodea was the most abundant sensillum type on the antennae of both sexes. Sexual dimorphism was only observed from the subtype 1 sensilla of s. trichodea in males and the subtype 3 sensilla of s. chaetica in females. The morphological information established in our study may provide useful information for further investigations in sensory physiological function of each morphological type of sensilla and their related behavior in this egg parasitoid.