actually good and bad are defined by social norms...
For example, polygamy is accepted in Muslim cultures but in most
other cultures it would be bad to have more than 1 wife (Actually
when u think about it, polygamy isn't that bizarre an idea,
considering the divorce rate and the number of men who have
extra-marital affairs... but that's another subject entirely)
For me, I try to be nice, it takes effort sometimes, but then I
would feel much better about myself