I bought my husband a pack of cock rings a while ago and I found myself deciding between regular clear ones and glow in the dark ones. In the end I went for the clear, thinking, "Why would I ever need a cock ring to glow in the dark?" We're a sex with the lights on couple, after all.
So skip ahead to earlier today. I lubed the husband up and stuck a cock ring on him. I possibly over-lubed. When he changed positions, the cock ring went "SPROING!" and flew off. We still haven't found it.
If I had opted for the glow in the dark ones we could have found it by turning the lights out. Next time, we're getting the glow in the dark rings.