I have stretch marks by my breasts (like near the armpit region where they begin), on my inner thighs and a little behind my arms. And I have a few on my stomach area.
I'm just really comfortable with my boyfriend I guess. I never really thought about them before. In fact, my boyfriend says he likes the ones on my boobs because it reminds him of how big they are.
But to be honest, if the person I'm having sex with really cares about my stretch marks, then more than likely, he/she not the right person for me. And I shouldn't be having sex with him/her in the first place, because I'm not perfect, and I want to be with someone who accepts me for who I am.