The closer you make the BJ to the real thing, the better. The wetter, sloppier, smoother it is, slight suction, the better. Run your hand in a twisting motion up and down on a VERY slick dick. Do not rub dry, do not pull, bend, bite, scratch or anything like that, instant turnoff.
Swallow! and keep sucking till he pushes you away. The deeper you put it in your mouth, the better.
This is one way to get a guy hooked.