I like bleeding, it is a strange quirk from my depression era. I've even donated blood in the past though sadly I can not do so any more. Too much international travel, not aids or something like that. Even was tapped for bone marrow once, but there wasn't a match so they didn't get to the really painful part. I'm in the organ donate program, because face it the act of giving the only thing you truly own in this world is one of the best acts you can undertake.
Interestingly, I used to freak some of the people out till I learned your not meant to look as if your enjoying it. I started meditating on how it felt, feeling my life blood draining away and contemplating life/death and the usual deep thoughts I have had in those few moments of clarity that strangely come with blood letting. They saw me doing this and panicked as if I was dying or something....
So yeah, don't act as if your enjoying it.