DD1 went on a school camping trip recently. I said to a friend who has daughter who is a bit younger, but same school year, that I hoped DD1's periods didn't start on the school trip.
She said "Oh hasn't she started yet? My DD started six months ago, and X, Y, Z and A, B C have all started. I would say she is a bit late, if anything. Have you thought of taking her to the doctors to make sure your DD is OK?"
DD1 is eleven and has just started secondary school. It's not like she was fifteen or sixteen. Isn't this a little bit barking? Friend's DD is Precious Only and always has to be First/Best at everything.