I never realized what a big deal it was to me until I was with a girl who didn't do it. She would let me cum in her mouth, so I can't complain that much, but she would spit it out which annoyed me to death. I don't mean to be shallow, but it ended up being a huge issue for me. I can honestly say I wouldn't date a chick who wouldn't take it in the mouth at all. It feels so good that it is something I want in a relationship, and if I didn't have it I would feel like I was missing out and I think I would begin to resent my gf. That might make me sound horribly superficial, but at the same time, I know chicks who won't date a guy who won't go down on her. And on that note, I LOVE going down on a girl, and I want a gf who LOVES going down on me.