So I seen a few profiles and eventually most of those profiles don't have biography. Also you should read this if you have a lame Biography.By the way putting your weight is not needed.
First you should start by talking about how you are , and favorite colors.Where you are from also if you don't like sharing personal things, you don't need to share it. Put your friends, and also you could really try puting a background to it.If you don't know how to scroll down and It will tell you. Also Other simple things for your biography or profile Be simple not to fancy like some profiles they do to much to it.
Another great idea is that you can put a picture. Its easy but you need to use the computer. First copy the link or web address and then in you Bio. put [ image ]Paste it here[ /image ] Then the pictures there.
You could also share your hobbies, Who inspires you and tell people why they should be their friends and , be nice don't say IM TOUGH SO DON'T MESS WITH ME , thats really rude.
Very simple things to do. Now for your Comment box just do this