I had an elderly grad school Mammalogy professor who was always thrilled to show us cute fuzzy creatures on a slide show, tell us what was unique, both taxonomically and phylogenetically, about them, and of course if or if not he had gotten a chance to pet them or wanted to still.

I would be thrilled to teach that course with half of the passion he did. Bonus points if it opened doors to work in the field and pet some of those mofos.