<human>: Could you distill the essence of the text into 1-3 sentences?

My one friend has been seeing this girl that has a boyfriend for about two months now. He says she's his dream girl and every time I see him has to tell me how hot this girl is, how she's an 11/10, and how he doesn't care she has a boyfriend.

He talks about how he bangs her all the time without a condom and how she's late on her period but that he hopes that she's pregnant cause he's ready to have a kid. I was blown away. 

I thought this was beyond fucked up, but I didn't want to get involved, and since I work with the guy and see him every day, I only simply said, "that's fucked up man". Truth of the matter is, I can't stand the fact that he or she is doing this to this guy I don't even know. I know what it feels like to be cheated on and it can practically trample the life out of you. So I'm thinking about anonymously facebook messaging the bf and giving him a hint. 

I'm unsure if this is wise of me to do though... I don't despise the guy, he's just very misguided. What do you guys think?
<bot>: One of my friends is seeing a girl who has a boyfriend and consistently having unprotected sex with her, trying to get her pregnant. I want to tell the girls boyfriend.