my boyfriend likes to be rough when we do foreplay. The problem is that he likes to bite. and when I say bite I mean BITE. No little nibbling or anything. I'm generally pretty small and bruise super easily. I wouldn't have too much of a problem with this (it doesn't hurt that much) but the bruises and marks are hidious and make me super self conscious. I've told him to stop of be softer but he says it's a habit. I know he's not trying to hurt me but it's getting to the point where I'm avoiding having sex with him. what do I do?