My wife has me cum in her mouth - but occasionally she will allow it to dribble out. When the blast catches the back of her throat or the volume is unusually large.
The last time she game be a BJ - she was adding some anal play, then pulled away and finished me with her hand - shooting a big load over my shoulder. She's gotten to where she likes doing that for the visual effect. Once in a while she gets me in the face - we get a good laugh when it happens.
I generally dislike the "mess" of not using a rubber or "finishing" in my vagina. However..."way back when" we weren't trying to get pregnant, my partner would pull out and cum on my stomach or back (depending on the position we were in). Once, he hit me in the back of the head after pulling out in doggy! We laugh about it now, but it was very gross when it happened.
A lot of it depends on my mood. I don't like it on my face though.
Usually I will just swallow it, but I love when he cums on my tits. Then after, he will play with my tits and rub it around, mmmmmm. The first time he licked it off my chest, I'm gonna admit I was a little weirded out, but it gets me totally hot now. Sometimes I like for him to cum on my clit and then rub it 'til I get off.