Welcome to Womanhood
When I was in middle school, I had a headache or bellyache or something whereby I was sent to the school nurse. She had me lay down in a corner of her office behind one of those privacy screens… and forgot I was there. Some time later, a girl comes in crying. She and the girl disappeared into the bathroom I’m guessing, then they were back… and I got to hear (unintentionally) the Welcome to Womanhood! speech (followed by a call to the girl’s mother to announce the wonderful news, and request some new clothes).
And thus – as a young male critter – I was welcomed to womanhood.