So I need to treat coworkers of the opposite sex and not smile at them? I can only smile to workers of the same sex? Isn't that a form of harassment? Can't I ju

So I need to treat coworkers of the opposite sex and not smile at them? I can only smile to workers of the same sex? Isn't that a form of harassment? Can't I just treat all coworkers the same regardless of gender, sexual identity, race, etc? Likewise, if the on-call engineer is female, I'm going to text or even call her late at night if I need her help.