People will say/do things to be socially acceptable, but for that alone and not for the spirit of the act itself and why it's viewed as admirable by society. You'll see this all the time in religious settings. They'll do it because "it's expected", but they won't take the time to think about why, and in turn they will never really understand when it's perfectly fine for them to retract or not make an offer. This will cause them to develop resentment for the act. So they'll grit their teeth and put on a smile for the sake of appearances, but when they think it's alright they'll complain incessantly about it. People who do this habitually are dishonest with themselves, and in turn dishonest with those around them. Because it's expedient. But it ain't right.