I find them pretty amusing. A WG put on a dark green one on me last week. Fucking her doggy watching this green monster pile driving her was a sight to behold. For a moment I had images of the Incredible Hulk fucking his girlfriend.
Many months ago I was punting with Smiley Sindy and we went through a few condoms, and each happened to be a colour, it was amusing finding out which one it was. She is a fun girl and her comments when she saw the colour were amusing. Eventually a red one came up and I ended up fucking her with that.