So it seems that my GF gets bladder infections after just about every time we have sex. Its a semi long distance thing but I see her 2-3 times a month for a few days each time. I dont think its an issue of to much sex in a short period of time because she's gotten them even when its been 1 sex session in a week. So now the DR has her on some antibiotic that she is to take anytime we have sex. Its not condoms or any lube either since she still gets them either way. Anyone have any ideas as to what might be causing them.