It's funny because it's true

Once upon a time, there was this guy we knew. His name was Billy.* Billy was a fun guy, liked to hang out and stuff. Then one day, something happened which changed Billy's life forever. He was IMing with some friends when he read a very funny joke. He typed "LMAO" as a response, but then it really fell off. It's true: Billy L'ed so hard his A fell O.

And now Billy's life is much more difficult. He can't sit in chairs properly. When he shops for pants, he always has to ask if the store has an A-less department. And just forget about going swimming. It's such a difficult life. We try and help him as much as we can. Sometimes, though, we L behind his back. His A-less back.

*Not his real name.