My boyfriend and I were intimate the other day and I noticed a small red bump on the shaft of his penis. I pointed it out and he went to the bathroom and inspected the bump. He squeezed it and a creamy white substance came out. He only had the one, and has never had anything like it before. It doesn't hurt, burn, itch, tingle, etc. Does it sound like an std, or maybe just a sebaceous gland.