Nocturnal penile tumescence

Nocturnal penile tumescence (abbreviated as NPT), also known colloquially as morning wood or morning glory, is a spontaneous erection of the penis during sleep or when waking up. All men without physiological erectile dysfunction experience nocturnal penile tumescence, usually three to five times during the night, typically during REM sleep. NPTs are believed to contribute to penile health.

单词	RigiScan
释义	RigiScan 英语百科 Nocturnal penile tumescence Nocturnal penile tumescence (abbreviated as NPT), also known colloquially as morning wood or morning glory, is a spontaneous erection of the penis during sleep or when waking up. All men without physiological erectile dysfunction experience nocturnal penile tumescence, usually three to five times during the night, typically during REM sleep. NPTs are believed to contribute to penile health.
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Nocturnal penile tumescence