If no one's mentioned it, you should look into something called the Aneros. Google it (I won't post a link, don't know if that's allowed). It's a prostate massage device, and if you have a lot of patience, an open mind, and a willingness to experiment, learning to use it properly is a very personal and pleasurable journey. I can have anal orgasms for up to an hour using it, you just learn to ride waves of prostate triggered pleasure. Then having a woman suck your cock at the end will produce the most complete, emptying, thorough orgasm you've ever felt.
It's not for everyone, but I do highly recommend it. It takes the male orgasm and male sexual pleasure capacity and increases it exponentially.
-R
i agree completely. my girlfriend is jealous of me, because of these things. they're too much fun for words.