Flirting is like unleashing a fountain of goodwill you have within you, that keeps getting replenished as you give it away. Yes, in a way you flirt for invigorate yourself. Flirting is 'attention' without 'intention.' It is not manipulative or coercive, it is a gift. How it is received is not up to you,, rather the other person. You offer a genuine ‘noticing’ of something beautiful about that person, and you simply decide to say it instead of keep it to yourself. Maybe the person just had a friend get sick, or lost a pet, and failed an exam, or...spread some light! Flirt with the neighbor's dog, the butcher, the person standing next in line. Flirt because you can!