Not sure, but myths about female sexuality are strong, even amongst younger women. Even in the age of hook-up culture, there's still so much slut-shaming and bullshit. The myth of how men are so much more sexual is a key aspect of patriarchy.

If so inclined, check out Untrue by Wednesday Martin. there's a lot of good data in there. For example,

Meanwhile, a 2017 study shows that among women aged twenty-five to twenty-nine, group sex and threesome experience equaled that of men the same age, and women were nearly twice as likely to have gone to a dungeon, BDSM, swingers’, or sex party, challenging the easy assumption that men are the naturally more sexually adventurous sex.

— Untrue: Why Nearly Everything We Believe About Women, Lust, and Infidelity Is Wrong and How the New Science Can Set Us Free by Wednesday Martin. https://a.co/9yBz6cE