In Italy we comment and compliment (or criticise) each other's attire regularly. It's widely known (for example) that I abhor exposed feet and will therefore call out and/or criticize sandals, flip-flops, or peep-toe shoes. Female workers do this to make workers, male workers do this to female workers. We successfully share same-sex toilets if the need arises. The regimented gender-divided situation the US seems to subtend is utterly alien to me and seems to be far more awkward than you realize.