Hear Hear. I’d argue that saying hello is not sexual harassment in its own right, but its all down to intention and the next act. If there is a sexual or anything close to unwarranted attention or intention, then it is harassment. It’s respect and emotional intelligence we need to encourage in our children — its okay to be attracted to someone, don’t be a dick, say hello if you feel it is appropriate and doesn’t make someone feel uncomfortable, if they’re clearly not interested, back off — regardless of gender, but especially when the male/female power dynamic you mention is in play. My two daughters are still young, but I’m already recognising that I need to teach them that no means no, it means stop, and if anyone continues after you’ve said that, you’re allowed to tattletale (this is the 4 year old version of course) and that is as true for when your sister says no as it is anyone else.