I love that little shot of adrenaline manufactured when my lover is holding me down and his penis is blocking my airway. Its better than a roller coaster. Logically I know that in a second he'll let me take a breath, but million of years of evolution have conditioned us towards self-preservation. My body reacts involuntarilly and I try to pull away and he holds me a few seconds longer before letting me go.
I enjoy having him come in my mouth, or in my ass or cunt a little more than I enjoy being ejaculated on. But so long as it's not in my ears, eyes, or nose it's all good. It's even better if a girlfriend cleans me up afterward-- lips and tongue, not a washcloth.