Most Helpful Guy
I wouldn't want my ex to be talking to any of my friends, saying things like "do you know what he wanted me to do in bed?" Because she could say anything and how am I gonna know? I also don't want someone in a position to compare me to one of my friends. I also want to forget about my ex and how can I do that if she's dating one of my friends?1
Most Helpful Girl
Maybe because that person is still in love with their ex. And I think it's more about respect.
If I knew you had a special relationship with someone and we're into each other, I--as what I consider to be a good friend--would like to give you a heads up and ask if you're comfortable with it instead of going ahead and doing what I selfishly want.
It's thinking about the other person/friend versus yourself to me.3