Instructables user seamster writes:

The initial goal of this project was to make a couple of bean bag-style pillow chairs stuffed with pieces of recycled foam.

But when I began working on a cover for the first pillow chair, I realized it looked a heck of a lot like an enormous brassiere. So I did what most maker-types would do when they get a wacky idea like this. They modify their original course, and pursue the wacky idea.