What do you notice when you hug someone?

This is mainly for guys, just because they're generally taller. Since I'm on the short side, and I'm a girl, I'd like to know what guys notice/think/see when they hug a girl. Is this still true for a quick hug? Just curious. Thanks :)
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One armed hugs from a girl: do you assume anything because of them?
What do you notice when you hug someone?
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