It refers to ...
Honesty,
Kindness,
Humility,
Popularity,
Patience,
Perseverance,
And those who possess it live a long and successful life.
People with a long groove are less trusting and more suspicious while people with a short groove are more likely to be flattered.
Men generally have a longer philtrum, making them less susceptible to deception than women. If your wife has a short philtrum, you can compliment her as much as you like and she won't suspect you.
