Heath was in his room, not his bed. He was in his room primarily because he liked Gideon's shower more than he liked his own, and you could never tell what Merton was keeping in the tub in his. After the lobster experience, Heath was wary of trying that. Still, showering in Gideon's bath did have it's benefits, like currently being naked in his best mate's room, toweling himself off and watching Gideon do a good impression of that one movie that Heath could never remember as he slid past the door in his socks.
You couldn't really recover your cool and nanchalant attitude after that, even if you were a rockstar, and Heath dropped the towel, he was laughing so hard.