ok, when i give a guy a blow job, i never know what they prefer. just lips? tongue? hands? a combo? and if i use just my lips, then my teeth rub against the inside of my mouth and it really hurts the next day. any sugestions?

A combo of everything, only you have to be pretty coordinated to get them all working together in the right directions and rythm.

I break it up a little, just to vary the stimulation so that it feels more interesting/intense, and also to give my mouth the occasional break. Any given blowjob will include some sort of combination of the following: licking and sucking on/around the head of the penis, deepthroating, hand pumping, and ball-licking.

Giving his balls a good tongue bath right in the middle of a BJ tends to make his orgasm more powerful. It does take attention away from the penis for a few minutes, but it feels good and if he wants he can pump himself with his hand while you lick.

As far as your teethare concerned, hmmmm either the inside of your mouth gets torn up, or his penis does, ouch. That's a delima... I can't figure out how your teeth would rub against the inside of your mouth, and I'm making some funny faces trying to work the process out. I'm sorry, I have no advice on that.

Ask and yea shall receive, well he will anyway.

Amazingly giving head does not come naturally to some, male or female it doesn't matter, if you find that you are unsure of what to do, instead of delving blindly into the unknown, use that mouth to ask some simple questions..

Do you like it when I lick this?

Does it hurt when I bite this?

Do you like it when I go fast or slow?

If you can think of away to make it sound like you know what your doing, and are just asking your partner how he/she likes it, so as to please them,instead of just saying, well, um, how do I do it, I'm sure things will work out.