Yeah yeah, your boy child breaks “gender norms”, but is offended because somebody said “pony tails are for girls”?. Why exactly is that offensive? Why are you more concerned about two boys' emotional pain than the fact that the only reason the teasing can cause pain is because they both accept that girls are inferior to boys and hence an undesired state? Why are you validating that thinking?
Congratulations on being and bringing up a misogynist.
Let us know if you have a really meaningful conversation instead of eating your time bringing up a gender norm breaking misogynist.