Whether we like it or not we are influenced from a very young age as to what is deemed to be attractive in the physical sense, and what is, well...not so attractive. This is probably brought about by many subtle messages that we're given through films, television and the media.
Big problem for many years now is that the film and television industry, and magazines and newspapers to a lesser extent, show us pictures of a certain type of physical beauty, and it's nearly always of someone young and in their prime. Girls from sixteen to thirty or so, young men between the ages of twenty and forty, all trim, taut and terrific. The reality is that the majority of people don't measure up to these Greek Gods and Godesses, so many of us begin to feel...well...That we were standing behind the door when God handed out good looks.
One thing though: perceived physical beauty is only the outer mantle; the magnet, you might say. But in order to keep that sort of pull, that person needs far more than their physical appearance.