Morning erections serve a highly specific biological purpose to prevent men from accidentally urinating on themselves while they are deeply unconscious.

A closer look

Morning erections serve a highly specific biological purpose to prevent men from accidentally urinating on themselves while they are deeply unconscious. The swelling of the tissue physically compresses the urethra, effectively blocking the bladder from randomly deciding to release its contents into the bedsheets during REM sleep. Your body essentially deploys an involuntary mechanical clamp to violently suppress your late-night bathroom urges so you can continue dreaming about flying without ruining your expensive mattress. It is absolutely hilarious that one of the most culturally hyper-masculinized biological functions is genuinely just a desperate internal mechanism to stop fully grown adults from frequently wetting the bed. Nature realized men simply could not be trusted to hold their bladders while asleep, so it implemented the most aggressive and structurally rigid plumbing defense system imaginable