Some of this might be my fault, because I keep sharing some of the rules I read on here, but my FI has assumed a couple of funny things about the wedding.
First, he thought he wasn't allowed to see the wedding presents. My grandfather and aunt sent us some presents very early, and they are being shipped to FI's parents house, so they won't sit outside our place while we are away on the honeymoon. Assuming any show up, it happened to some friends. Anyway, he was over there, and I wasn't. The name on the box was just his last name, so they weren't sure if it was for us or his parents. He hid upstairs while his sister opened the box to see if they were wedding presents. I thought it was funny, because he thought he wasn't allowed to see them before the wedding. I told him we had so see them, so we can send thank you cards.
Second, he got new dress shoes for that wedding. He thinks they are great and is proud of them. However, today he asked if he was allowed to wear them again after the wedding, or if he can only wear them for the wedding. I asked if he really thought all the other men who bought new shoes for their wedding never wore them again. He agreed that would be silly.
The way his mind works sometimes cracks me up.