When you orgasm, the brain releases a cocktail of neurochemicals that make you tired. "During sex, the brain releases oxytocin which heightens arousal and excitement," Laino told INSIDER. "But when it wears off, it can leave people feeling really tired."

Why do I feel so tired after ejaculating?

Oxytocin and vasopressin, two other chemicals released during orgasm, are also associated with sleep. Their release frequently accompanies that of melatonin, the primary hormone that regulates our body clocks. Oxytocin is also thought to reduce stress levels, which again could lead to relaxation and sleepiness.

Does ejaculating make you weaker?

Does Masturbation Cause Weakness? NO, Masturbation does not cause weakness. ... Prolactin hormone is released during masturbation and as per studies Prolactin can influence sleep, thus making you feel tired and drowsy. Fun fact, many people even masturbate to help them fall asleep and relieve stress.