This is something I've always wondered about. Men very rarely make false allegations of rape. It is almost always something done by a woman.

You can argue about how common false allegations are all you want, but it doesn't change this discrepancy.

Sexual assault against men is at least equally as big of a problem as the reverse. But false allegations pretty much only ever effect men.

https://www.scientificamerican.com/article/sexual-victimization-by-women-is-more-common-than-previously-known/

http://webshare.law.ucla.edu/Faculty/bibs/stemple/Stemple-SexualVictimizationPerpetratedFinal.pdf