What are some ways for introverts to know to if they are generally considered physically attractive?

Anonymous

I know some introverts who are guys say when they do go out, people mostly respond to them, in a positive way, and they know that some people stare at them, but they don't really get hit on, but they think that that might be, because they don't look approachable, or smile.

What are some ways for introverts to know to if they are generally considered physically attractive?
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