Well personally, I had a rather horrible experience with the first guy I was with. He wanted me on my knees, was dirty, and pulled my hair. He got about twenty seconds before I couldn't do it anymore and basically ran off, embarrassed as hell.

With my current boyfriend....I do enjoy them, but I ask him to wear a condom still as I'm just not comfortable with it yet. I dunno if its repressed memories from the first guy(which I really hope it's not, because he shouldn't suffer because of that), or because I'm not ready to have him cum in my mouth...but he never holds it out too long, and is generally pretty invested in it, though I would like him to talk to me more durring it, and play with my hair(Petting, brushing, but NOT YANKING -.- I don't know why that's expected). The other reason for the condom is I have braces and I'm afraid I'll cut him with the brackets. I don't do it as much as I actually want to because well....he rarely ever returns the favor, but he's so damn good when he does. I hate that I sort of punish him for it, because I know, im not always the freshest of flowers, but.... I like it when he goes down on me, and its very clear he doesn't like it(except when I'm in the bath that is, since he knows it's clean then.) Still, I love letting him cum 'in my mouth' without it being all messy. Plus, he rather seems to enjoy it.

He did ask me once if I would do it while kneeling....which I did, and because he didn't know the details of the first time, he sort of left me there to go clean up without helping me up first. It was sort of crushing you know? It's not his fault since he didn't know any better, but it really sucked sitting there on the floor waiting for him to come back to me. I still haven't told him it hurt me, or why it did, but I don't want him to feel like he fucked up, because he's been great to me in so many ways, both in the relationship, life in general and in the bedroom.