I guess I’m in the majority, cut, 10 years old. Something about a hard on that just makes you go crazy.
I doubt you can really be tired out sexually. It’s bullshit. I’ve masturbated probably more than ten thousand times, easily (when I was younger, two to three times a day, maybe even more). And half sex one or two thousand times.
Hell, I just finished jacking off ten minutes ago (not kidding). :D
edit: and I am very capable of multiple orgasms, in fact, I can’t be truely satisfied most of the time unless I jack off twice withing going flaccid.