Contemplative thought #1. It is horrible to feel undesired.
Contemplative thought #2. (In relation to contemplative thought #1) The desire to be more attractive than one already is, and the disappointment one feels when the accomplishment of said desire is unfullfilled. Therefore leading to the horrible feeling of being undesirable, made worse only by the fact that you saw a beautiful, flawless individual walk past.
Contemplative thought #3. Fishing for complements is never a sufficent boost for the ego. They must be spontanious and unexpected.
Contemplative thought #4. Lust.