It has come to light, that when my son had his Puberty Lesson ( live online at home due to bubble isolating at end of last term) the boys were not taught about periods. The girls had an extra session about that. They did however all learn about wet dreams and erections. I can see how the girls would benefit from an extra girls only session, but am I being unreasonable in thinking boys need to know about periods too? I have of course enlightened him now - prompted by needing him to know real reason I can't always say yes I will definately go swimming on a specific future date. (I'm in my 50's and not entirely predictable). Previous to this I've had a policy of answering questions simply, as they arise, about body matters. YANBU - a mixed class puberty lesson should cover periods. YABU - only girls need to know about periods.