I wasn't expecting my fiance to be an expert on weddings, but I assumed he would have been to one in his life or seen one in a movie and had a vague idea of what was going on. I was wrong.
Among other things, I get a phone call from him asking "at what point in the ceremony is the best man supposed to give the toast?", and only after a few minutes of me laughing hysterically did I say "um, honey, toasts happen during the reception"
I've got some others but I will save them for later.
Any anecdotes to share?