(click to enlarge)
Update: I recently ran into a nearly identical strip in a book of New Yorker cartoons (actually, the big book of New Yorker cartoons). The other guy predated this joke by decades, which means that it's exactly the sort of droll, subtle humor that I should be avoiding. I came up with this sucker independently, for the record.
Drawing the ties was the hardest part - stick figures have no neck.