Libras have this flirtatious ways, gestures, mannerism in communicating with others even if they don't actually flirt! It is something spontaneous.
I caught myself doing it so many times but there is nothing sexual about it, just light charming gesture or a smile.
Not one Libra woman that I know (including myself) are attention whores. There is plenty of attention around either we like it or not. Most Libra women that I know are beautiful women, feminine in their mannerism, fun and pleasant to be around...no wonder they attract people.