Oh bullshit. If I'm hanging out with my boss at a barbegue and does something stupid and I say "you're such a dumbass", it's a fun jab. If my boss says incorrect or misinformed in front of customers, and I say the exact same thing, in the exact same tones with the exact same stupid grin, it could be a lost sale, and a reprimand. Context does matter, and it's not some whimsical flight of fancy by fickle and capricious women.