Description from Knitty.com:

I went to every mastectomy boutique and medical supply store in the city. There were titties of every shape, size and skin color (from beige to dark brown) but none were what I wanted -- perky, cute and comfortable. They were too heavy, squishy or ugly.

…

To cheer myself up, I rummaged through my stash looking for something luxurious to knit up. Then it hit me that I could knit myself a new titty; in fact, I had so much yarn I could knit myself a different titty for every day of the week, month, year!

I finished my first knitted titty an hour before the party and wore it with one of my favorite lacy underwires. When a friend, who had been following the whole titty saga, saw me she remarked, "You really did a great job! Your left breast looks almost as good as the right one -- a bit lumpy but very realistic."

"You know," I replied, "It was my right breast that was removed."

NOTE: Tit bits has recently been featured in the new book KnitKnit.

Also on Debbie Macombers site.