@pkhaney My first thought was that he was looking for evidence that you’re either cheating or planning to leave him to give him an excuse to cheat himself (potential new hobby).
@zondaar39 My 6 & 8 year olds wear the same size most of the time. They share a dresser too. To keep underwear separate, I buy 2x each pack with a different print style for each girl. Oldest has b&w/ leopard/ pale pink. Younger has bright colors.