Or rather, a wording one.
Let's say I'm talking with some people on an Internet forum and are surprised that they have girlfriends. And some of them actually have fiancees and wives, which is all the more surprising to me. Do I say:
1. I'm surprised that you have fiancees and wives, let alone girlfriends!
OR
2. I'm surprised that you have girlfriends, let alone fiancees and wives!
I get the order confused.