A 1994 study in the United States, which looked at the number of sexual partners in a lifetime, found 20% of heterosexual men had only one partner, 55% had two to 20 partners, and 25% had more than 20 partners.
General Social Survey data indicates that the distribution of partner numbers among men who have sex exclusively with men and men who have sex exclusively with women is similar, but that differences appear in the proportion of those with very high number of partners, which is larger among gay men, but that in any case makes up a small minority for both groups.
Severe and impulsive promiscuity, along with a compulsive urge to engage in illicit sex with attached individuals is a common symptom of borderline personality disorder, histrionic personality disorder and antisocial personality disorder but most promiscuous individuals do not have these disorders. The study measured one-night stands, attitudes to casual sex, and number of sexual partners.
Britain's position on the international index "may be linked to increasing social acceptance of promiscuity among women as well as men".
No woman, by contrast, agreed to such propositions from men of average attractiveness.
While men were in general comfortable with the requests, regardless of their willingness ("Why do we have to wait until tonight?
Accurately assessing people's sexual behavior is difficult, since strong social and personal motivations occur, depending on social sanctions and taboos, for either minimizing or exaggerating reported sexual activity.