I think it's kind of funny how you can't seem to wrap your brain around this practice, Redpepper. Something about it must really not appeal to you. You're trying so hard to figure it out, LOL.
Looks like something that seems to work for many people, but doesn't work for others, just like anything else. I'm sure, when such an opportunity arises, some people are like, "Hey, yeah, let's all go out, that's cool!" while others are "A date with both of you?? Nuh-uh!" Guess it just depends on the people involved.