Performance art: Wilson likes to watch, but he's too shy to ask for it, at least at first. Vanessa draws it out of him: he wants to watch Wesley eat her out, long and slow.

Vanessa is totally into it, loving the idea of being on display. And Wesley, well, Wesley is completely at his master's command.

(Optional headcanon: Wesley doesn't like to be touched, but takes pride in a job well done.)