Is he really lucky? Does this colleague really know whether women choose him because of the way he looks, or because of his character?
Is it really rewarding to be given everything you want just because of the way you look?
Is he confident? Or is it that his lack of confidence makes him go for the "easy kill" and get his way?
I knew a guy in Tokyo who would play the numbers. Chat up nearly every girl he came across - if he "tricked" one girl in every 10, then he pulled at least once or twice a week. Was he confident? The heck he wasn't - one of the most insecure people I have met. But people THOUGHT he was confident.
As human beings we tend to concentrate on our own weak points to the exclusion of our positive points. We love thinking that others have it better than us. We love thinking we are so poor because we have a strange nose, or small butt, no muscles or no boobs.
Forget it all - it's all a huge bunch of balloney. Live your life - be yourself, be pleasant and you'll find people respond whatever you look like and there'll always be someone who appreciates who you are. The longer you hide yourself behind your own fragile shell, the longer it will take to realise your potential.