I always interpreted it as the Dr. being the cause and he’s removing himself (by going up the elevator) but he’s going to leave them with the symptom of being horny. I did a bit of searching and it looks like there’s a number of ways to interpret the line. Yet another reason to love the movie.

Reminds me of blood gnats from The Marvelous Misadventures of Flapjack.

https://knowyourmeme.com/memes/finna-jerk-it

Googling the first number shows that it’s a prank number designed to waste time: https://worldofprankcalls.com/beverly/