5. Because having a little brother that is taller than you is a paradox is hours of fun to lament over.
4. Having a brother like Mark means that Mom & Dad worry less about me.
3. Because some one has to understand the pop culture references that I spout out.
2. Because even if he doesn't admit it, his dimples are still cute.
and the #1 reason...
1. Because some one has to reach the Tequila of the top shelf for me.