You seriously appear (to me at least) to be saying that morality is what the majority of the people around you--or at least the people who had the teaching of you as a child--tells you is moral.

Etymologically, that is precisely what morality is. I agree that the meaning of the word is evolving to also cover something like an absolute standard of right and wrong, but I believe the older meaning is still the primary one. 'Ethics' would be a less ambiguous term for the kind of absolute morality you describe.