I am fairly new at knitting--knitting only about 5 months. Now, my problem is this--I cannot understand how to use the short row technique. The pattern states: Cast on 21 stitches. k1,p1 to the last stitch, slip the last stitch, turn. K1,P1, for 20 stitches, wrap the next stitch. Turn. K1,P1 for 19 stitches, wrap next stitch, turn. Why can't you just knit 2 together? What's the purpose of a "wrap"? I've looked at Amy's short row technique and I just cannot get it . Can anyone help me??