This is a question iv been thinking about for some time. When we masturbate we are loosing energy, we see the pure white liquid and we feel drained. According to the 1st law of thermodynamics energy cannot be created or destroyed, it can only be changed from one form to another. When we have sex we are exchanging energy with our partner. But when we are masturbating we are expelling our life force and energy into a tissue. So where does this energy go?