At the beginning of this week I was wondering the very same thing. Then I was talking about knitting with one of the girls at work and she asked me to teach her how to purl (which was very flattering since I'm so new at this) She brought in a scarf that she was working on in homespun and frogged it because she wanted it to have stripes.
I taught her how to purl, but of course she was very use to the regular knit stitch and would accidentally knit one or two in the middle of her purl row. Between the squigglyness of homespun, her very loose knitting, and how new she was to knitting, she couldn't see that stockinette had a flat side or tell that her out of place knit stitches were making 'bumps' on the flat side.
Despite having gigantic size 15 needles, she was getting them stuck in the strand of yarn (though I think that it might have partly been due to the beating the yarn had taken from the 5 times she frogged it while we were at work. Lord only knows how many times she frogged it before she knew how to purl)
All that said... it was really soft and cuddly :teehee: