They don't hide that well.

Observe how they act on a Friday night at the bar around their girlfriends. Watch what they eat (make sure they eat meat and not too many carbs!) and how drunk they get and how they behave. Are they the one screaming, or the one rolling their eyes at the screamer.

Crazies are too into shopping, too into personal grooming (perfect hair and French nails and caked on makeup), too into getting likes on social media.

Want to avoid the crazies? Find women with hobbies. Women who like to sew or make crafts, women who play sports but aren't dykey, women who eat healthy. Avoid those with tattoos. Avoid those with bugged out eyes. Accept that all women are a bit crazy, but find the crazy you can tolerate. Avoid women who watch a lot of television or are always on their phones.

Avoid women who want to get too sexual straight away. They are always nuts, from what guys tell me.