The phenomenon of 'morning wood', or nocturnal penile tumescence, is explained through the lens of sleep cycles and physiological responses. Contrary to popular belief, the occurrence isn't always linked to erotic dreams. Instead, it stems from REM (rapid eye movement) sleep, a period characterized by increased brain activity and peak testosterone levels. During this phase, the brain diminishes the influence of certain neurotransmitters that suppress erections during wakefulness, leading to spontaneous erections. This normal and healthy response serves as an interesting aspect of male physiology.
"Morning erections, known medically as nocturnal penile tumescence, are a natural and healthy physiological response... They occur during REM sleep, when brain activity increases and testosterone levels reach their peak."
"During REM, the body temporarily reduces the influence of neurotransmitters that usually suppress erections while awake, allowing spontaneous erections to occur."
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