In this silly YouTube animation, there is a short sequence where a child is drawing a bear, an adult asks her what she is doing and she responds “I’m drawing a bear”. Then the camera zooms out and it turns out she is drawing the bear on a bear. The bear then proceeds to eat her. At first I thought this was just meaningless absurdity, but recently I heard someone claiming that the joke is because “drawing a bear” could also mean the same thing as “drawing on a bear”.
I am a native (British) English speaker and this sounds really odd to me. I could imagine the joke would work if the girl said “I’m painting a bear”, but I can’t imagine that draw works in the same way. I can’t find any dictionary references to back up this other meaning of draw. What is going on here?