I am going to give a TMI response. My penis would fall asleep well even though the phenomenon scared who would I talk to it about. One day my friend told me the same happened to him he relieved me by telling me it's from unknowingly sitting in my balls. Yes I know disgusting but true. Coincidentally days later i bumped into these under wear call it Devine invention. This is my third shipment I've even given some away. I love this underwear alot.