权威例句
anilingus:
anilingus
anilingus
Article on health risks of anilingus
List of sex positions
P1-S5.06 Oral sex and risk of sexually transmitted infections
VALIDITY OF SEXUAL HISTORIES IN A PROSPECTIVE STUDY OF MALE SEXUAL CONTACTS OF MEN WITH AIDS OR AN AIDS-RELATED CONDITION
Psychophysiologic assessment of women with posttraumatic stress disorder resulting from childhood sexual abuse.
Intestinal parasitic infections in homosexual men: prevalence, symptoms and factors in transmission
High rates of enteric protozoal infections in selected homosexual men attending a venereal disease clinic
