Studies show that someone may display interest in you only because you liked them first. Needless to say, the human ego is at work here. Few things feel as great as knowing you tickle someone's fancy, so long as you're not perceived to be a creep, weirdo, or stalker of some kind. If you find them attractive, they may be flattered and think you have good taste. And then once they show interest in you, you may be flattered and think they have good taste. Thus, we have a cycle in which interpersonal attraction grows on both sides. But as we all know, attraction can ebb and flow over the course of the relationship. Lusty attraction in the context of the so-called honeymoon stage -- where both partners see each other in the most favorable light -- doesn't last forever. Once the relationship begins to mature and both individuals grow more comfortable with each other, those intense feelings give way to comfort and security -- though that isn't to say the mutu...