I understand exactly where you're coming from, Tx. I have had several blowjobs in which said individual probably tried to imitate that porn trick, and I turned to instant jitters. It's like we discussed in a related thread; it's good to stimulate the head, but it's almost vital to have that stimulation spread out over the whole of the cock, or else it would be too sensitive to enjoy.

But, of course, if I keep getting sucked after the fact, I'll do everything in my power to separate myself from the action. It makes the glans tingle to the point of discomfort; you can see it in the way my body "lurches."