But I got to thinking about it the other day. It is obviously a reference to the time-honored tradition of That's what she said in response to any kind of innuendo or lewd comment.
However! Wouldn't it be more accurate for the quote to be:
I know it isn't as apparent what the joke is that way, but in the context of the line, the hypothetical "she" never said "that's what." What she actually said is "That" in reference to the comment before.
Is this right? or is the T-shirt in the right here?