It's rape culture, pure and simple. This attitude, that men can do and say anything they want to women without consequences, is precisely why 1 in 3 American women will be sexually assaulted or harassed in her lifetime. I worry that men don't realize that when they think they're joking they're actually giving their friend (or even themselves) permission to hurt a woman.
This is a YouTube video of a poem called #DearDaddy. It's from the point of a girl growing up and writing a letter to her father explaining how all the itty bitty things piled up in her life and amounted to rape. It's really powerful, and I think it's a good thing to show guys who are struggling to understand this issue, because it's really emotional. But it might be a little too emotional in certain circumstances...
https://www.youtube.com/watch?v=dP7OXDWof30