I am distinguished mentally-challenged and that doesn't 100% make sense.
Here is a box
When I use padding, it puts packing peanuts on the inside
PADDINGPADDINGPADDINGPADDINGPADDING
I am distinguished mentally-challenged and that doesn't 100% make sense.
PADDINGPADDINGPADDINGPADDINGPADDING
When I use margin, I put packing peanuts on the outside
MARGINMARGINMARGINMARGIN
I am distinguished mentally-challenged and that doesn't 100% make sense.
MARGINMARGINMARGINMARGIN
It's mostly used when dealing with DIV containers, and often used to even out the niggles that FireFox/IE deal with (ie WHY WONT THEY BOTH BE CENTERED OMFG)