Why do people write blogs?

Why to write a blog? I asked one of my friend..point blank! It's the in-thing now..dude..he shots back!! Yeah..sure..I nodded. Some writes to earn their living (this is an understatement..people have made millions!!)..some wants to spread some social message..some others wants to discuss things like their hobbies, experiences, to share their expertise blah blah..some just doesn't want to waste their money on PRO (go ask Amitabh, Aamir, Shahrukh and hoards of new bollywood stars)..few others have, as my friend with Psychology major calls it, Attention Seeking Personality Disorder (ASPD)...and she is sure to add half a billion people as her client by the next year..So make your own judgment and believe whatever you want..but one thing is for sure..All the people wants to start a blog..because they want to DO something..because they are not lazy..so if you want to start one..don't analyze why and ask too many questions..as Nike has put it so succinctly..Just Do It!!