What does it mean when a mans private vibrates for no reason even in his sleep? it happens when he's not turned on and i notice it when we cuddle

? but benign: Curiously, this symptom is reported occasionally, possibly more commonly by men in their 20's. It seems to be self-limited and goes away without any treatment or intervention. From what I have read, urologists have evaluated men for this and have found nothing to explain it. But I wouldn't worry .. it is more of a mild, annoying curiosity and should soon be gone. Good wishes!