Full bladder: Most often first thing in the morning, especially common in pre-pubertal & young post-pubertal boys. Most males, before developing erectile dysfunction, have nocturnal erections, may or may not be related to erotic dreams. Wet dreams associated with erections may be due to build up of semen in seminal vesicles rather than eroticism. Sickle cell disease & leukemia can cause blood sludge & erection
Answered 9/22/2018
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