It's been said before (probably by me), but Billy Brandt right as he was making his debut in Absolute Arid. Of course, he was made up like crazy to hide his ink, even back then. Still, the scene where he discovers/demonstrates how much fun having a ticklish asshole can be - it always struck me that he was trying not to laugh as well as just enjoying the feel of being licked. Whatever was going on, that scene turned him into the twink/twunk who loved having his ass licked, at least as far as the porn world was concerned.