Yeah, Dany, try this analogy to understand why cookies are necessary:
You go to a shoe repair shop to drop off a pair of shoes. You give the old cobbler at the counter your shoes and he gives you a numbered repair ticket. He says, "don't lose the ticket or I won't remember you - I'm an old guy ya know." You then leave the shop to walk around the mall and come back in an hour but you threw away the ticket. The old man looks at you blankly like he has never seen you before because all he knows is that ticket #.
Cookies are like that ticket #. The cookie itself is a small file that you allow a website to put on your computer. In general it doesn't usually have any private information in it - just some kind of ticket# unique to you and a date when it will expire.
When you visit a site, your browser gives the cookie back to the site like handing over that repair ticket and the web site can look up your number in its database and say: Oh, it's you again, Danyunknown (ironic userid, btw). Even if you enter your userid and password and hit that submit button, the site will refuse to recognize you if you refuse to accept a cookie (websites are extremely senile).
so be nice and let HG give you a cookie in IE.
In all your science of the mind, seeking blind through flesh and bone
Find the blood inside this stone
Well, I know I've never shown what I feel, I've always known
I plan my vengeance on my own - and I was always alone