"There's a difference between "i helped my uncle jack off his horse", and "I helped my uncle, Jack, off his horse."If you can't see the difference, then there's either no hope for you or English isn't your first language. And I sincerely hope it's the latter.
Grammar is an extremely important part of daily lives, and some (well, a lot of internet dwellers) of you think that grammar isn't something to pay attention to on the internet. "BT ITS THE INTERNT NT SKOOL"