Sorry, have to disagree. Maybe you are not aware of the type I am speaking of. I own chrome cock rings which if you get the proper fit are perfectly safe. I own plastic ones that are rigid and do not "give" much but again, with a proper fit are pretty safe. The one I speak of is fine for not use as far as I'm concerned because I've been doing it for a very long time. I've never once felt it was too tight or cutting off circulation. It stretches along with the penis but keeps just a little pressure to help keep some of the blood in. It is nothing like a metal or hard plastic cock ring. I would never sleep with one of those on and also that individual in the article you posted is a full scale moron for waiting 48hrs before getting help bro . I will try to send a pic. The one I am talking about is so gentle on the pressure I don't even use it during sex, only for sleeping or wearing through the day to help retain some of my pump after a workout.