Going raw .. why?

Hi,

Something that's come up quite a lot is people saying after they finish the cleanse that they plan on 'going raw'. I assume this is where you only eat raw foods. Now what I want to know is, why? What's the benefit in eating raw over cooked. Currently I only eat raw but that's because I can't be bothered cooking (hehe) and I don't feel much different than when eating cooked foods.

Thanks,
Erika