Fuckin' a man, I did for my first girlfriend when I was 15... Not bad, not bad at all. Sometimes I do the whole "swapping" thing with my current girlfriend after we both cum during 69... I actually asked her to not swallow after I finish during 69, because I think swapping our fluids while making out is extremely hot.
Oh, and I've occasionally been known to ejaculate into a shot glass to drink my little guys during solo masturbation. I don't feel as guilty about killing 'em that way :thumbsup: