THE HUMP & SQUEEZE
This technique can provide that pre-ejaculatory feeling for as long as you want. Lie on a bed (or the floor, but a bed/couch works best) on your stomach, with your penis against your abdomen. With one hand, reach under you and grab your penis. Now "hump" the bed, and as you thrust your pelvis down, squeeze your penis. As you move back up, loosen your squeeze. Repeat these steps. Before long, you should get that feeling you get right before ejaculation — but don't stop or anything. Just keep going — if you "hump" at just the right speed, that feeling will last, and you won't ejaculate. If you secrete a lot of "pre-cum," it can get messy; consider putting a towel under you.
Yogi[/off for a towel now.....]