I've found that the best way to accomplish this, at least for me, is to masturbate until I know I'm getting close and take it just far enough to cum, but stop just before I have an orgasm. It's difficult at times to slow down at that point. I might have a success rate of about 50% when I'm trying. Now the real fun begins after I cum. I lick it out of my hand, swirl it around in my mouth, and start masturbating again. I don't think I've lasted more than 30 seconds after that, though. I can't seem to slow down. 


