Many men want to increase the amount of sperm they produce. This is for a couple of reasons: first, mathematically, the greater the sperm count in ejaculations, the great the likelihood that one of the little rascals will make it and fertilize the egg. Secondly, a larger sperm load may increase the duration and pleasure of the orgasm. More ejaculate equals a longer orgasm? Maybe. Amino acids seem to be the key here, and among the natural volume producers is thought to be L-Argenine. In any event, male enhancement products such as Extenze that increase sperm production would also increase testosterone. This in turn may increase size and duration of an erection.