I love doing that. Last summer, I had a threesome with an older guy (early 40) and a guy around my age. It started with the awkward realization that all 3 of us mostly topped and felt like doing just that at the moment, but it turned into a very steamy show of domination. We fondled each other, made each other suck our cocks, and overall tried to turn one of the other 2 into a bitch for the evening.
We kept the action going in the older guy's bedroom, where we started being bolder with our moves. We rubbed our cocks on each other, getting rock hard in the process, and after 15 minutes of teasing each other's holes and eating them out we came to a silent agreement when we got into position for the fucking to begin. I was inside the other young guy (he was loosened up from all the teasing yet still tight) while riding the older guy's cock. He may have not given in to the idea of bottoming, but I still dominated him as I did all the work while he was pinned down by my body and the other guy's.
We were all sweaty from our light wrestle to dominate the others, horny from the desire to fuck, and moaning from the good ride we were having. It felt amazing to alternate between thrusting into my bitch and riding my other bitch's cock with him having no control over it. He just laid there, enjoying the feeling of getting power bottomed, face to face with another man who was moaning from the attention I also gave him, until his moans got louder and turned into primal groans. I felt his cock pumping gallons inside me, telling me he loved every second of it, that turned me on so much I didn't last much longer inside the other who was already ready to shoot his load as well.
Definitely the best fuck I've ever had, I totally recommend it.