Do you really know? Why do men often wake up with an erection?
Nov 25, 2025
Ever wondered why men wake up with an erection? It turns out, it's not about dreams or urgency to pee, but rather a physiological reflex tied to REM sleep. During these sleep phases, which make up a fifth of our slumber, men experience several nocturnal erections. Interestingly, women also have increased blood flow to the clitoris at night. If morning erections stop, it might hint at age-related changes or other health concerns. Tune in for a quick dive into the science behind this fascinating phenomenon!
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Morning Erections Are A Sleep Reflex
- Morning erections are a physiological reflex linked to REM sleep rather than sexual arousal.
- Men typically get several nocturnal penile tumescences each night during REM phases.
REM Sleep Triggers Physiological Changes
- REM sleep features vivid dreaming and brain activity similar to wakefulness while the body stays still.
- REM causes neurological changes that increase penile blood flow and produce erections.
Hormones And Touch Also Play A Role
- Hormone shifts and subtle physical stimulation also contribute to nighttime erections.
- Testosterone peaks in the morning and fabrics or partners can produce minor stimulation that leads to an erection.