Man, tell you the truth younger me would have been like “Yea! She got a boyfriend, screw they guy I’m gonna bang her anyway!”
but after a little life experience man dudes are crazy.. all he has to do is suspect she’s cheating follow her to the date and now you got a fight or worse on your hands.
So in 2020 I say leave chicks with boyfriends alone.
Just said everything man!
I follow this mindset too... You don't get anything than a ego supply and a chance to be on fight or get shot by a guy.
OP, don't fall into that trap man... Those kind of women don't worth the price.
Had a case where I date a pretty hot girl, she was a HB9+... She said me she dated a drug dealer in the past (I should've leave in that moment!), but she had broke up with him.
Then I found out by a friend that she was still dating this guy. I could get killed... So I just cut all contact with her and never look at her face. It definetely doesn't worth!
If a girl have a bf and want to date you, it's the Master of All Red Flags it could even exist! We live on a crazy World bro... Everything is possible.
Also, that guy could be a good person... Bro before hoes. Better an ally than a enemy in that case.