Have you ever just saw guys in their 20's that makes you question, "What the heck is going on here?" As a man matures you need to become smarter, wiser, and become more time efficient.

If you qualify within the 20's age group, you need to stop doing things that only school girls should be doing.

Here is a list of eight things that all guys should stop doing by their 20's.

Thinking You Know It All

Everyone becomes victim to this at one point in their lives.

The fact of the matter is, no one want to hang around a guy who thinks he knows it all and is invincible.