Much "projection" going on here, I think

[CG9603]

See associated link.  I think that they do something because these individuals think that members of the opposite gender are doing it even more. 

http://www.allvoices.com/contributed-news/1981745-british-girls-have-had-an-average-of-nine-sexual-partners-by-age-of-21-encountered-average-of-3-teeth
 

[SIAM]

Grab a quote from the usual feminist template:

More magazine editor Lisa Smosarski said: "Our results show today's twenty-something women are taking control of their sex lives and getting what they want in bed."

Frame everything as women being in control:

But if a woman met someone she really liked, 56 per cent would make him wait "a month or more" before she would have sex with him.

This is like a parody of an 80s Cosmopolitan article.