The Bunny Factor

Whenever I list something in my etsy shop or post here on my blog I submit it to stumbleupon by clicking the 'I like it!' button because I read somewhere that this is a good way of getting increased views on your sites. It has brought me quite a lot of views - but there is a pattern emerging which you can see in the picture above. Whenever I list a bunny in my etsy shop I get loads of views through stumbleupon, but whenever I list anything else I get very few views. So what is this bunny factor all about? My husband has his theory, which was further supported by the fact that the other amigurumi listing which got loads of views through stumbleupon was Schoolgirl Sally... What do you think causes the bunny factor?