You think that I'M experiencing confusion? Too funny;) Claiming as you do that sleepiness after orgasm is due to the loss of "a huge amount of energy after ejaculation" is either ignorant or dishonest...unless of course you at least mention the hormones that are released at that time. Ever heard of dopamine, oxytocin, or prolactin? I suspect that you have though it's possible the opposite is true. So, either you don't know about hormonal responses to sex and orgasm (ignorance) or you do know and chose to not mention them (dishonesty) in order to link the reader's common experience to a totally unsupported concept of "loss of a huge amount of energy".