I really wanted to live up to everyone's expectations, especially if those expectations were of a basset hound wearing a bathrobe.
What's really weird is that Spike's eternal plea that he can't come down and do the show with Tom because "that would ruin the mystique!" has become as true as anything there ever was. It is way more fun to speculate, and I think that Spike, as much of a fathead as he can be, deserves at least a tip of the hat for taking this all in stride.
He is a total woman hater though, and I love when Tom busts him on it.