My fiance (M31) is short. His height has always been a source of insecurity for him and he takes others comments too seriously.
With our wedding approaching, he asked if I'd consider wearing flat shoes at the wedding. I was confused, like very confused. I asked if he was joking, but he went on a rant about how doesn't want to be made fun of on his own wedding, and that if I choose to wear high heels then we will look 'awkward' in the photos and in front of the guests.
I refused, and he kept calling me selfish and inconsiderate and said that I prioritized high heels over his comfort and happiness for the big day. He had his mom involved and she is pushing me to reconsider.
When I refused to discuss it she said that my unwillingness to cooperate is a huge indicator of my level of maturity, she then went on a long rant about what lengths 'real wives' are willing to go to to help out their husbands and said that I'm apparently too immature and shallow to be committed in a marriage if I make such an issue out of it.