One time my girlfriend and I let my friend who was visiting from out of town into the mix. His cock was smaller than mine, like 5” and skinny. He fucked her first. It was weird to watch someone else inside her. It made me kind of angry, but kind of turned on. I’m pretty dom in the bedroom, and I started telling him what to do. Telling him to fuck her and where. I think that surprised him and got him super turned on. He came really quickly, and I told him he needed to come outside of her. Which he did. I got in there and fucked her hard with a weird rage that was super hot. It was hot to feel where my friend just was. I think it would have been way different if he was bigger than me. Would have messed with my head. But as he was smaller I felt weirdly in charge. I was hoping he and I would DP her. We talked about it beforehand and I’d fuck her in the ass while he got her pussy. but she opted out in the moment. Which was fine. Still want to try it though.