No it does not. It does not in any way effect the normal functioning of my dick. I get hard, I get soft, I can pee and ejaculate, just as if I were not wearing it. The biggest effect is with my balls. Mine are high and tight and when I get erect they draw up and practically disappear inside my body, especially when it's cold. (Oh how I look longingly at men with a nice pair of low hangers.) The cock ring holds them down in my sac for a better appearance when I'm nude and a better contour in the crotch of a swim brief.

When I said I wear it 24/7/365 I really did mean that. I've worn it to medical appointments, even with a urologist. No doctor has so much as batted an eye or made any comment about it being harmful, so I guess it's OK. Indeed, I've worn mine pretty much continuously for more than fifteen years now with no ill effects.

For what it's worth, I had a friend who has since passed away who suffered from ED. He had a cock ring which was prescribed by his doctor that just went around his penis to keep it hard. I would caution any man who wore such a ring to follow his doctor's recommendations.