Can you have a real, solid, healthy relationship if you only care about someone for something in return?

I’ve been thinking about this this morning as I was doing dishes and making cookies, and I’ve come to the conclusion that you can’t have a good relationship if you only do things for something in return. What do you think? Could you make it work? Would it eventually fall apart? And I’m not talking about just SO relationships. What about other people? What if we all just did one nice thing for somebody today, without expecting anything?

What are your thoughts?