While receiving, as long as you're not hung like a horse girth wise I'm good to go. I have my limitations. Other than that, I enjoy all forms of ass play including tongue, fingers, toys, and spanking too. Mmmm...Mmmm...Good!
If requested, I will don a strap on and go to town. I "milk the bull" too as Dallas puts it. Or, I put on a latex glove, lube up a finger or two, and provide a stimulating prostate massage while deep throating a rock hard cock. It's all up to the "end" user.