I am a gay guy, and my biggest turn-on is for a guy to cum inside me. The psychological pleasure of feeling a man inside me, his cock throbbing, muscles tensing, facing contorting, as he unloads is overwhelming. I guess I love the feeling that I am giving him so much pleasure it sends him over the edge, that I am responsible for that pleasure, and his orgasm is a manifestation of that. I also love the feeling of ownership ("I am tattooing your insides with my DNA" is what one guy said), that when a guy has cum inside me it feels as though I have been tainted, spoiled, owned. I also like the idea that he is making me "pregnant", although a physical impossibility, the thought of his cum actually changing something inside of me, almost like a poison that I am powerless over, is extremely arousing. I'd love to know what drives you to have a guy cum inside you.