Some women are just more approachable than others. My wife is a people watcher when we are out and she isn't afraid to make eye contact when guys walk by. There have been multiple occasions when we were at a restaurant or bar, I might need to use the restroom, and when I come back she is in the middle of a conversation with some stranger. She often introduces me to her new friend and tells me a little about him. I notice that she seems to smile even more when we are in a place where she sees black guys. No setup needed; she is very approachable.