Good question! Perhaps you could take the ‘women and girls’ out of the equation, and talk about courtesy toward everyone. Hold the door open for your father. Make your guests feel comfortable. If you’re driving, unlock the passenger door first even if it’s just your buddy getting in. No means no; doesn’t matter who’s saying it. And yes, there are special rules for the ‘weak’: Give up your seat on the bus to an elderly or disabled person, or anyone with a lot of packages. Be considerate towards everybody.