Movie's always had a dragon fetish, and having Spike nearby doesn't do anything to deter her need for dragon poon. That and she's just relentlessly horny, I mean look at that horn. It's huge.
Anyway, enough of torturous metaphors, it's always fun to draw a grown, lanky version of Spike, very similar to how Frist draws him. There's nothing wrong with canon grown up buff Spike, but tall, thin, lanky, long-armed Spike is my personal favorite.