I have only had the pleasure of a multiple orgasm once (so far) in my life. A girl I was seeing was unsure if she wanted to continue with our sexual relationship, so we abstained for about 2 weeks. We still saw each other 2-3 times a week and even slept together many times (she loved to cuddle naked). Now that was very tough on me, and I had constant wood whenever she was anywhere near me. ^_^
After about 2 weeks of no sex, we woke up one morning and she decided that enough was enough, she was horny as hell and wanted to cum. I think the major tent that I was pitching when we woke up together may have helped in that decision.
She visited the bathroom and I expected I would be going down on her when she returned. She could only have orgasms with direct clitoral stimulation, so we usually started out that way.
She surprised me when she returned from the bathroom and said "Put on a condom, now", mounted me as soon as it was on and started to ride me. Although she did enjoy being on top, I was usually the one doing most of the thrusting from below, as she would lean forward to have the most body-to-body contact. Not this time. She rode me upright, very sensuously, and was doing almost all of the thrusting.
Well, after a 2 week drought, with a gorgeous woman making love with me, I didn't last very long before cumming. Instead of dismounting me, she stayed put and we continued our sex talk, and caressing each other, etc. She even used her pussy muscles to squeeze me and tease me. I stayed hard as a rock and a minute or two later, she started riding me again. This time I lasted much, much longer and had a great 2nd orgasm. After about 5-10 minutes rest we went at it again, but there was no repeat of my multiple orgasm.
My most intense orgasms happen after I get lots of stimulation, so I am one man who is a huge fan of foreplay (and duringplay, and afterplay.)
I am like many of you, in that my cock is way too sensitive for continued stimulation after a particularly great orgasm. Would I like to cum, stay hard, and come again, and maybe even again? Of course I would. But since I don't, I like to make each of my single orgasms as pleasurable as possible. My alternative to multiple orgasms is multiple sessions!
Even at 44, give me 5-10 minutes after I cum, a beautiful woman to play with, and I'm ready to go again.