Research has conclusively found that males who wake up with an erection do so because they were having a dream involving sexual activity or content.

Question

Quizplus · Accepted Answer

Morning erections, also known as nocturnal penile tumescence, are primarily related to the sleep cycle, particularly REM sleep, and not necessarily due to sexual content in dreams. They are a normal physiological response and can occur without sexual stimulation or dreams.

Research Has Conclusively Found That Males Who Wake Up with an Erection