It just makes me happy knowing that no matter how many surgeries they get, what clothes they wear and what they edit on their legal documents you can always tell what sex they are.
Even the butchest, masculine woman will always be 1000x more feminine than any man wearing a dress. Even the most feminine, girly man will always be 1000x more masculine than any woman wearing short hair.
I'm so glad that it's biologically ingrained in us to easily tell the different between the sexes at a seconds notice. (mainly to find out if it's a threat (a male) or a friend (female).