How to use "that's what she said" in real-life

and also how to waste a post.

SWEET: and my friend tied the string from my sweatshirt to my ears
chrisleetyped:
chrisleetyped: ahhhh
chrisleetyped: dude, that could hurt
SWEET: lol it didn't. it wasn't tight or anything
chrisleetyped: thats waht she said