In short, how can you tell when some sexism is happening to you? Well, in this matter, what ultimately aids us is to simply apply this question to the issues: Is this polite? If we--the entire population of the earth, male and female alike--are just, essentially, 'the guys,' then was one of the guys just...uncouth to a fellow guy? Don't call it sexism. Call it 'manners' instead. When a woman blinks a little, shakes her head like Columbo, and says, 'I'm sorry, but that sounded a little...uncivil.' a man is apt to apologize. Because even the most rampant bigot on earth has no defense against a charge of simply being rude.