I'm almost certain your comment is tongue-in-cheek, but it did pique my curiosity - what do you think the actual ratio of unwanted explicit photos from each sex is? I have a hard time imagining it being less than 99:1.
1. https://leginfo.legislature.ca.gov/faces/billTextClient.xhtm...
I have never once received an unwanted nude from a woman but as spam whereas with men it has happened enough times for me to believe without statistical justification that unwanted images of male genitalia would be more common.
I am not sure how this is relevant to building a classifier, however. Or relevant to California law.
I think a lot of unsolicited female genitalia is sent for spam/scam proposes. A particularly pernicious sort is in the form of sextortion [1]. Images of female genitalia may be sent by a criminal to entice a (typically young or teenage) boy into believing he’s engaging in an online romantic relationship with a real girl. When he reciprocates with images of his own body (as requested to do so), the criminal responds by using those images to blackmail him into paying money with the threat of exposing him to friends and family. This sort of attack has also been used to target girls, though recently the targeting of boys has grown much faster. If I had to speculate, criminals likely see young boys as easier targets who can be enticed with images of the female body.
If I opened an app one day and received an unsolicited picture of female genitalia, that would be strange. If it happened every day, then it's spam, even if I don't have a strong aversion to it.
IIRC, in something like 2000 interviews there were 4 male flashers and zero female.
Four more than expected when we're paying for their time.
2000:4:0