It's definitely better being in someone's holes with a friend or two. The times I've done it, I focus on fucking my friend's dick with mine. It feels realllly good and I can tell they like it because their dick gets even harder. I mostly focus on rubbing the heads of our dicks together. If I do that, it won't be long before he cums with me.
I'd say our big and dark dicks are just right for asses. Especially if we can fit two or three in the same hole at once, it feels nice to rub dicks together.