Not true. Women can't play in the same circles as men when it comes to behaviour or roughness. I grew up with sisters and have overheard them talk when they didn't know I could hear. And they can't even come close to what guys will say. My friends and I have joked about beating girls into comas, raping them and setting them on fire. And we can laugh about it and feel no stress. Girls don't do that sort of thing. But, women like to compete with men on crudeness.