I suppose so but I just know it's the polite thing to do. My mother always taught me that if people do something, you should always try to pay it twice forward.

[Which made him smile softly before chuckling to himself. Indeed, his mother did always teach him to be polite and use his manners as much as possible. Perhaps it might be a cultural thing but at least he knew better.]

...And that's what I believe in too.