Most people simply like to avoid conflict, and, generally, smile and engage us in polite conversation. The problem becomes if you try to establish a relationship with them. That's when you'll find out just how accepting, or tolerating, they really are. Talking to a nice couple? Terrific! Then try to invite the husband alone down to the local sports bar for a few drinks while you're 'en femme'. See how well that goes over. Things can change very quickly once it becomes very real, and 'in their backyard'.