A Phallic Joke I Somehow Missed

Every time I watched this scene from "Steal Wool," I would be so focused on Treg Brown's famously incongruous sound effects (this was one of the scenes where he experimented with using sounds that had literally nothing to do with the object on the screen, like locomotive noises) that I missed the obvious phallic joke. It took this video to point it out to me:



And yes, I assume that any such joke in a cartoon is intentional.