Common steps and sub-activities
Preventing ejaculation – Cock rings
Another thing that can be done to ensure you do not ejaculate - remembering the objective is to build up your reserves of energy, not to have an orgasm is to use a ‘cock ring’.
The old Chinese training manuals for this used silk thread and some rather complicated knot work, but these days you don’t need knowledge of knots in order to achieve the same effect.
The following is from a web site I found after only a short search…..
Tri 3 Ring Cock Ring
This triple action cock cage applies just the right amount of pressure in all the right places. Due to its expert design, the stretchy rubber Tri Ring snugly fits round the scrotum, shaft and base of the penis. This allows it to help prevent premature ejaculation, and to maintain a stronger erection.
To put it on apply lubricant, pinch the largest and smallest rings together and slide down to the base of your penis with the medium cock ring underneath. Next, pull your testes through the biggest cock ring and down through the medium ring (some force may be needed). The result is the largest ring goes around your shaft and balls together, the medium ring goes around the testicles and the smallest one goes around the shaft. When you have worn it once, you should not have any problems getting it on again.
http://www.temptationsdirect.co.uk/x/14153/Buy/Tri-3Ring-Cock-Ring.html#ixzz1qVsKdMT8