What do you think about "casual relationship" (CR)? I think CR means no future, no responsibility, just for fun. It is different from One Night Stand because it can be a long term thing, not only for one night. Are American more open to that idea? Are people back home in China even more open to that idea than we are?
As for me, I cannot imagine to have a CR because I need both body AND soul.
What do you think?

在一起久了，自然会产生感情，要维系这种关系，除非是没心没肺。