not the punchline I was expecting

Earlier today I was in a sexual harassment workshop for work. It's exactly like the ones you see parodied on television, where you watch videos of inappropriate behavior and then are asked by the presenter to point out the obvious. We're watching this one where a hoary old professor asks his secretary to send out the "memo" he just sent her. It's already pretty humorous because of the casting choice and stilted lines. It continues:

*secretary opens email and gasps in horror*

Secretary: "Did you mean to send this to me?"

Dirty Professor: "You're supposed to laugh. It's just a joke."

*awkward pause*

Dirty Professor: "I thought you liked animals."