Why penis get erected usually in the morning? Only for Biologist and Be +ive
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due to fall in norepinephrine level
Explanation:
when you enter into REM sleep (random ete movement sleep i.e. a deep sleep state) , the neurotransmitters of your body specifically norepinephrine decreases and testosterone related activities are able to take place.
norepinephrine causes vasoconstriction (decreasing the blood vessel to allow lower blood flow) which is why you don't get an er*ction in the daytime.
when this norepinephrine is decreased it causes vasodilation (increasing the blood vessel to allow higher blood flow) and so you get an erec*ion while you are in deep sleep or when you are feeling excessively excited.
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