Whether it's for better health, personal confidence, to maximize your athletic potential, or a combination of all three, every man in the world wants to get more muscular. If you are a typical young male, you likely want to get more muscular for appearance - to look good for the ladies. A worthwhile goal. Its not just bout looking good on the beach.
Most guys know that looking or being muscular can get them attention from the opposite sex, but there are other long-term benefits. Most guys probably never think "looking muscular" could help them get a job or get chosen for a promotion. But your looks can help you.