Ok guys thanks for all the comments about this. Since other guys can do & come from this method, I decided to give it more of an effort. I was able to finally come from head-play, after abstaining from sex or masturbation for a few days. I used by vibrator on the cock-head only - and it felt amazing. Then I got some lube & did the 'ok' sign technique and that was also very nice sensations but not quite enough for climax....I finally ended up shooting with the vibrator on my cock-tip again. I gotta say, it was good but it wasn't all mind-blowing or anything. I just seem to need some shaft play (with lube is the best....) to really come.