http://www.pixiv.net/member_illust.php?mode=medium&illust_id=45772001 I hate samples too、but it hasn't been share since 2014. I think aragi swaps with bodies with the vampire eternal loli.
Shinobu is pretty much THE PERFECT girl for Araragi and anyone else really as she can be the type of girl you desire. She can be a loli, oppai loli, pre-teen, teenager, and/or a mature onee-san . Really she's like the best girl for him especially since she has a direct link with him so she can feel twice the pleasure and the fact that she's with him all the time, so he can just do her whenever he wants and in any of her form.