So you are fine if she is second or third hand. I mean how on the earth you can make a trustworthy relationship with a girl whom you know is already fucked by 2 other dicks. I don't know how American culture accept it but here in India if there is a situation like this it would be a straight up divorce (Not 100% but yeah no one actually would love to live with such a girl)
It doesn't really matter ""too many penises dipped in". If a girl has more than 1 physical relationship I would say you can NEVER trust the bitch in entire life. The other day she would cheat on you. You won't ever have strong and trustworthy relationship.
I don't like to set standards I can't meet myself. Not just in relationships, but in all walks of life. What does having sex when single have to do with trust in a relationship? I am one hell of a slut when I'm single, but I have never even considered cheating when in a relationship. If I felt the need to cheat I would end the relationship and that's that. It's retarded to assume that anyone who has had sex with another will cheat on you.