When you're having “the talk” with your boy, it's important to help him understand that female menstruation is a biologically natural event. Every woman experiences it at some point. It's not something that is abnormal or disgusting – in fact, having your period means that a woman is healthy! Once they understand this, they won't think its “weird” or “gross”.
Come on. Having period is already so tough – imagine having boys laugh and tease you about it when you experience a leak or when you're doubled over struggling through cramps! That's why, as parents, it's good to teach boys to respect and consider the feelings of girls who are on their period. If boys are taught from young that they need to be understanding towards them, those who have their period can truly face it with confidence.