Activity for susie

Both of my parents told me that they want and expect my FH to wear a tuxedo, but Fh wont feel comfortable and wants to wear a black suit. I feel like I am caught in the middle and don't know what to do. What would you do?

My father wants my FH and all GM, including the 2 fathers, to wear a tux but FH wants to wear a black suit. I dont want to disappoint my father and also want my FH to be happy. I am caught in the middle. who should decide what the groom wears?