Family problems.
I can't even count the number of girls I talked to that suddenly revealed that their father / brother raped them.
Weird shit. But as sweet as some of these girls are, they can never fully go past these events and keep talking about them.
Also I don't wanna imagine how girls like that work in long term relationships, I can't picture a long lasting peaceful relationship with a girl who's earliest and normally most significant relationships, aka family, went down south like that.