Все знают, что американцев с детства учат улыбаться, а русские со своими мрачными рожами никогда не улыбаются.
safety-tips-shared-by-women -- "I don't make eye contact or smile at anyone who isn't another woman or a child. I keep an RBF in public. That way, you won't have a guy approaching you, mistaking your friendly smile as hitting on them. We all grew up being told to be friendly and smile at everyone we see (at least in the Bible Belt of Ohio, where I grew up). Growing up, I learned that is complete BS. No random dude deserves my smile unless they've earned it."