Sighing the sigh of a condemned man, Harry wracked his brain for a way to put things that wouldn't land him having to 'take a seat over there.'

"Basically, the humor is them offering something he knows he shouldn't want, but does anyway. So they keep tempting him, until he finally admits he does want it, after enduring all the frustration leading up to that moment, then when he finally admits he wants it, he gets saved before he can take advantage of the situation."