No. The trick is to have the orgasms but not ejaculate. I've read about it in Taoist writings. Then you don't get dehydrated or worn out. It ain't easy, though. It seems to require a great deal of esoteric training to master the technique, and I bet there isn't one man in 100,000 who's done it, specially in the West. (sigh)

We're all amateurs really...