Empty Offers
Your mate walks over to you and offers his assistance with your moving house plans on the weekend. You say that you wouldn't want to destroy their weekend by helping you move. Then your mate says "ok no worries, but if you need me just call". That is a fine example of offering but not actually wanting to help.
You see people are transparent at the best of times, people generally cannot think and do at the same time when it has not already been planned. And this is evident when your friends offer something in hope you might say no. Because if you don't then they must actually help you.
Empty offers are a lousy friendship occurrence in all our lives. We seem to get them from even the oddest of subjects, like parents and close friends. The worst thing is we have all done it, and yet we can all pick the offers when we hear them. So why do we bother? To feed our ethically challenged subconscious mind. We must offer to help in order to make us feel better about ourselves. Why don't we all just offer when intending to help someone, therefore we will all know the exact help we will get.