I experienced quite a pang of jealousy at the thought of being the same frame size as my wife when I read your post! Imagine being able to share bikes!
I'm 5'8" and she's 5'4" (or 5'5", I forget!), so we're within a reasonable margin of tolerance. Which is indicative of our marriage in general, I'd say.
When your wife borrows your bike to go to work and her colleague sends you a photo of it left totally unlocked.