Several years ago, I ended an e-mail to a then-couple I knew -- one of them (she) one of my best friends, the other (he) not my friend anymore -- with a line I'd heard via Peter David*: "Why does the word lisp have a S?" (I may or may not have quoted the next line, "How cruel is that?")
But the guy, the no-longer-my-friend person in this anecdote, replied thus:
Because without the "S" it would be lip, which was already taken.
Honestly, I remember reading that reply and feeling a little deflated. "Wow: He, doesn't, get it," I thought.
* David was quoting one of his daughters in his column.