I can do dry male multiple orgasms with a lot of warm up (an hour or so) and serious mental concentration on sexy thoughts. After that I can go at least ninety minutes of irregular (some strong some weaker) dry orgasms . . . probably 8 -10 in the two hours. It takes focus and concentration though. Last night was an amazing first that was totally different than anything I have ever done before. Usually ...hormone levels in the middle of the night are at peak which makes the orgasms much more pleasureable between 2-4 am. So I have gotten into the practice of waking up at 3 am or so to do a session which usually goes until 5:30 am or so. I usually do them when I travel for work ...I travel alot. Anyway ...last night at 4:00 am I woke up to find my wife almost on top of me as I layed on my back. She was cold. My cock was fully erect as it some times is in the middle of the night. Her inner thigh was resting on my cock; my cock was a couple of inches from her pussy (I could feel the hair). I should add that we both sleep naked. The tip of my cock was really sensitive and the warmth of her thigh juiced me up. I was feeling really horny and was wide awake now. Slowly I nudged my crotch under her while keeping my upper body away from her . . . we looked something like an x with our legs entwined and my cock nestled in her pussy crack. I layed perfectly still and focused on the feeling of her warm wet pussy craddling my hard cock . . . . then all hell broke loose. As I struggled to lay perfectly still, the hard thumping of my prostate began and my ass hole began to spasm as if I was ejaculating but I wasn't. I was going into uncontrolled dry orgasms with no nasty mental imagery and no thought what so ever ...it was just happening. I literally had no control of it. The spasms in my asshole and prostate were alternating bouncing back and forth at a pace that got faster with each spasm. After twenty or so spasms I was gripping my pillow and stiffling the urge to grunt, moan and twist or writhe. The spasms got so fast they came to a crescendo that ended with strong rythmic pumping of my prostate that felt unbelieveable. The pumping alternated with flutters .. . .about 6-8 of them. Instead of ending though ...just as they were almost done a new set would start to build up and the whole thing would start again. I was totally out of control . . . there was nothing I could do but go along for the ride. After 5 or 6 back to back hard orgasms over 30 minutes I was exhausted and sweating. So l slid out from under her and went into the bathroom to cool off and pee. About ten minutes later I got back in bed to find my wife on her side, knees bent and legs up as she lay on her side. I got in bed and laid behind her and I got in a spoon arrangement behind her. My semi stiff cock was now nestled inbetween her ass cheeks. Well son of a gun ...it starts again ...the uncontrollable spasms the building crescendo of pleasure culminating in a ping pong match of spasms between my asshole and prostate going faster and faster. I was so sensitive now that instead of fluttering down in a serious of dry pumping actions my prostate gripped in a wrenching spasm as if it was trying to force out cum but there was nothing there. I had to back away from her because this time I couldn't hold still. I was tensing and pushing out my hard cock but this time pre cum was running out in a slow stream. This lasted about two or threee minutes each. With nipple stimulation i was able to push myself into 7 or 8 more of these in 90 minutes. By 6:30 I was truly exhausted. . . the sun was up and my asshole was throbbing big time. I was sweating and clamy and was actually afraid I was going to have a heart attack in bed. It is 12 hours later and my asshole and prostate are still feeling weak and tender. Several times today I got phantom flutters in my asshole. What a night. I never lost control like that and I never had such hard dry orgasmic spasms . . . it was like a sexy girl reached inside my asshole and was squeezing my prostate and tickling the tip of my cock at the same time. Amazingly enough my wife slept thru it all except for an occassional shift in bed or twitch. Holy crap it was really an amazing experience. My solo sessions will never be the same.