This method is fantastic and will give you an unbelievable sensation. You need a soft-bristle toothbrush. Use the brush to gently and slowly rub your balls and underside of your penis. It will give you a feeling like you've never had. You can fondle yourself for hours this way. When you take a break and start up again, you'll experience the same intense pleasure without ejaculating. You can use the handle of the brush to rub your scrotum with as well as the crack of your hole...it feels soooo good. Be careful: Don't brush under your penis head for too long or you'll ejaculate. When you do want to climax, just start masturbating normally. Try it – I can pleasure myself up to 4 hours with this method, and my penis remains as erect as can be the whole time.
[For hygiene reasons, do not use your own or someone else's personal toothbrush for this technique.]