Preening Shows Romantic Interest
Things are not going well if you're at a bar and try to flirt with someone across the room, but all they do is gaze blankly at you and perhaps wince a little. However, there are various indicators that can let you know you have a chance in this situation.
You may watch for specific behaviors that show someone is trying their best for you even before you start a dialogue. These preening acts include toying with or adjusting one's hair. In a club, you'll frequently observe this kind of conduct, which occasionally transcends the subconscious and becomes quite intentional. Sometimes people will "accidentally" curl their hair around a finger in a very obvious purposeful display. It originates from the unconscious body language that says, "Appear how good I look," to the person.
Having no hair at all? No issue. Anything that makes it obvious that someone is improving their appearance is acceptable. The requirement is anything that transforms you from being unaware of your look to being really concerned with it, such as fixing clothes or sitting up straight.