I've seen many men reccommend using anal stimulation, but I recently discovered a new twist on it.
First, drink a lot of water while you get aroused looking at porn or reading some of the hot stories here. I mean a lot, go until you are in agony, then go a little more. I think I swallowed over a gallon.
Once full, grab the device you'll use for anal stimulation and go to a spot you can clean easily. I went out on our back deck, and had my wife's small plastic vibrator.
I lubed it up then slowly slid it up my back door. I then cranked up the power, and oh damn did it feel great! The fullness of my bladder amplified the sensations, driving me nuts with lust. I cannot describe how fuckin' awesome it was.
During this, it's inevitable you wind up peeing on yourself. That's cool! Let it go, it makes great lube for stroking your cock!
I had the most mind blowing orgasm with this technique. Yes, I was soaking wet with piss and cum afterward, and wound up using it as lube for a second orgasm just a few minutes later!
And if you are a lady, you'll enjoy this too as the technique was reccommended to me by a lady friend who uses it frequently.