LOL!
That has a different meaning for those of us who raise reptiles. “Sexing” is attempting to deduce whether your critter is male or female. The breeder of our chameleon, Paco ... whoops, Paula ... did it wrong!
If wifey and I are out and spot a hardcore homosexual of either gender, we’ll sometimes comment that “I can’t sex that one”. Some of these lesbians, especially, have really got it down, so to speak.