It’s explained here in this video.
Hot Crazy Matrix A Man’s Guide to Women - ORIGINAL
https://www.youtube.com/watch?v=pInk1rV2VEg&ab_channel=JamesYeager
I’ve watched it many times, and yes I’m aware of his explanation. It just doesn’t match reality today. Not in America anyway. Maybe the ladyboys in Thailand are “chill” ... don’t know. Never been there.