yes i do use the vib sort of in front of him, well not with him sat there by my feet and actually watching!!! but he is laid next to me, he starts out, and i give directions but usually end up having to take over, dont think i could do it with him actually watching every detail though. as far as pulling my skin back when hes working on me, thats out of the question, whether he has his dick in me or is using his fingers or tongue i just cant get involved then, if my fingers go anywhere near, its becomes the off button, i just cant do it.
Then tell him to pull the skin back for you. About the vib, before he starts out you start out first. Use the vibe on yourself first, make an erotic show of it if you want, or not. Make sure he whatches, even place his hand on it, tell him not to put pressure, just to feel the pressure you're using. After the demonstration advance by holding his hand along the way while he's using the vibe on you, again he's not to appy the pressure or anything but allow you to apply it while he gets the feel of it. Ditto with speed, type of motion, positions, etc. He may just need practice and a good mentor (you). Good luck .