The sensation in a man's penis when he needs to have a piss and thus walks inside in search for a toilet, but since he has encountered air warmer than that outside, he pisses himself.
Person: "Oh man, I was outside in the cold and now that I'm inside I've got sudden heat dick meltdown!"
Whilst I was driving my car raju was holding my bottle of water between his legs. As he passed me my bottle, I could feel warmth at the base of the bottle. I exclaimed "Raju! I can feel your dick heat."