It felt like with the right group of girlfriends, you could talk about anything. But that wasn’t entirely true. There was one thing that we never talked about: masturbation. The contrast was bizarre. We could be so open and vulnerable with each other and yet so closed when it came to this one topic. In school, boys would talk about masturbation as casually as they talked about what they’d had for breakfast. If any of the girls, on the other hand, were asked if they masturbated, there was only one acceptable
Source: Do you talk about masturbation? Here’s why you should – especially if you’re a woman.