I've switched nothing, and yes women file 2/3rds of the time...that's an unrelated issue. Many women rent a guy for a few years, then purposely become an intolerable overweight anchor, one day announce they're bored and steal half his estate, future income, and retirement. Then they get thin again and start over. In the real world many would consider this theft by deception.
Sure, but just as many men land a woman and let themselves go to heck.
There's no way to limit this sort of lousy behavior to only one sex.