I can be so dense sometimes. Some days, it takes me several minutes before I get someone's witty remark. In this case, it took me several hours. And it wasn't the remark that was so witty, but the delivery of the message was. In fact, the remark wasn't even the message.
You miss subtle things like that when you're busy. And it's only when your mind relaxes that it suddenly clicks. And -- boom! -- there you are, grinning to yourself like an idiot. And, it's even more embarrassing when you're grinning to yourself in public, like in the middle of a serious discussion over a late lunch with a friend.
And so you have to make an excuse about remembering a joke, but then they want to hear the joke, which puts you in a greater predicament because it wasn't really a joke. And besides, something witty doesn't really stand on its own outside the context it was originally delivered in.
I realize that lots of things probably go whoosh right over my head. Probably more so recently. But, hey, I eventually decode the smoke signals. :D
/me hums, "... is keeping all my secrets safe tonight ..."