"Erection in the morning" is a normal physiological reaction of men. Before waking up in the morning, the bladder is full of urine, and the pressure in the bladder increases, which leads to the penile subconscious reflex erection, which belongs to the penile erection caused by visceral organ reflex. Of course, precocious puberty and sexual desire can also cause penile erection, but those are all led by consciousness and happen through human sexual fantasies. 1: Morning sex is a common physiological reaction of young men with strong sexual desire, but it is not necessary. 2. Chen Bo is a physiological reflex caused by strong sexual desire and abdominal distension. It's normal, but it's not abnormal without morning news. 3. Young people are sexually active, and morning blogs are more common.