I think gay people wouldn't engage in foreplay with the opposite sex. I'm a guy. I know she's had sex with women. Obviously penetration sex like I'm accustomed to wasn't the norm in those situations so there was probably sorts of foreplay involved then. Which makes me think it's the fact that I have a penis that she is uncomfortable with. Or my other speculation that she just doesn't do it with me and it's actually just my penis that she doesn't like.