Regardless of the actual ratio of people that get it in contrast to those that don't get it, there has to be people that didn't get it and are directly benefited from his 'explanation'. On another point, I immediately knew about what the OP was talking about, but the actual name completely slipped my mind, so I guess I also found the explanation useful. It's right up there with the people that post "clickable links" to a website. It might seem distasteful to some, but hell they are useful in a myriad of situations.

I didn’t know. I very much appreciate people explaining jokes.

Judging from the downvotes, it's interesting to see that most people don't seem to know the second meaning of "sex" as a simple synonym to "gender", thus falsely assuming my above comment to be offensive.