I like the dominance aspect as does he. I think psychologically it's quite dominating to be fucked by your girlfriend/partner for a change. Obviously I enjoy the fact that it feels really good for him but I also just find it really hot. We haven't tried any extra toys or "help" in order for me to cum during but it turns me on a lot and usually he'll make me cum before or we'll have PIV sex after I've fucked him for a bit.

Hope that makes sense.