azulmagia, are you telepathic? Because you 'stolen my thunder' as we say down under.
A couple of technicalities I'd like to point out with some of Onidama's argument, just because I can. Excuse me if I don't correlate my arguments with the order Onidama presents them in.
While it's true that sperm that isn't ejaculated is reabsorbed into the body (you're always making sperm, so what else could you do with it?), I hardly think that an abstaining man would be superhuman compared to one who doesn't. I mean, you'd think that someone'd notice after all these centuries of living, right? There had to be someone who didn't masturbate long enough to find out.
Calcuim and phosphorus aren't only found in the bone. Nerves and muscles and anything else that needs energy does too. If you really did exhaust
all, or most of, your calcium and phosphorus, you wouldn't get just tremors. You'd probably have tetanus where no calcuim is available to start contractions, and no ATP to relax muscles.
And by the way, while red blood cells are formed in the bone marrow, they're still based on iron molecules, not calcium.
There really isn't all that much volume to ejaculated semen, no matter how much there appears to be. You probably could repelish any alleged 'lost' Ca and Phosphorus in your next meal. And since men continually produce semen from adolescence unto death, loss of spermatozoa isn't really an issue.
Besides, why don't we see prostitutes affected by this continuous release of 'sexual energy'?
If you're going to talk about 'crimes against nature', and if the release of semen even in sex is a loss of 'sexual energy', how're we supposed to reproduce?
And I highly doubt that people will use a mechanical device to get the seed from the bull, which would cost more money on an already expensive operation, when it'd be far cheaper to physically induce the bull to ejaculate.
The level of testosterone in your blood isn't necessarily influenced by the amount of sperm being produced. Well, actually, if you've got too much sperm, your testosterone level is going to swing down becuase of negative feedback mechanisms.
I do believe that melatonin is the hormone of your internal clock rather than of 'eternal youth', if my quick google of that hormone is to be believed. And the human magnetic field isn't even enough to affect a really light and thin compass needle held in your hand, and mostly generated my the electrical impulses in your brain, not the pineal gland.
As to exhaustion, people are probably more exhausted after sex than after masturbation, and if you ask around, the majority of women would pick sex over masturbation. I wonder why?