Is it normal I don't know if it's nice or polite?
I've thought about this a few times and I'm wondering if it's what being, "good" or if there is a difference between good, nice, and polite, and that being polite isn't a moral or immoral way to be but a societal beneficial expectation for civilization.
Most of us try to be good people but are the good things we do something we do to fill our own personal moral quotas?
I'm sure everyone does this but I will speak of myself for examples. I've done good things like everyone else, I'm nice to strangers, and I'm polite. That said, I never do it because I want others to feel good, their happiness doesn't bring me happiness but I try my best to do good things despite having no real reason.
An example would be when you're at the supermarket and finishing paying for your groceries, you almost always say thank you, but you're not really thankful, it's just a routine of politeness for no other reason than it's expected, expected so that you don't get perceived as bad or rude from others. This analogy is how I feel whenever I do a good or polite thing, I do it because I know it's good, even though I get no moral gratification from it or satisfied by it, like I'm thanking a cashier.
Is this what selfless is? To do things for others even if it's for shallow reasons as expectation and wanting to seem like a good person?
I'm sure people do this all the time, it's how I feel whenever I'm doing a good thing.
Is this normal or healthy?