What do Wizards dream of? (Patreon)

I don't know about Gandalf and Dumbledore, but this wizard was on a quest with this dwarf warrior and since then, he's had fantasies of being the dwarf's helpless prisoner. Bound, gagged (so as not to be able to utter spells), naked (no magical objects to help him), he's just an old man taken by his captor to his underground lair. And what happens to him there? Well, our wizard has quite an imagination, so a lot is possible.

Any ideas?