http://youlookfab.com/2006/09/.....he-skinny/
Hi Emely, here is a post that Angie wrote on rethinking skinny jeans back in 2006 when they started making the comeback to mainstream retail. I hope it helps answer your question.
There is also a search box at the top of the page, you may be able to type in the topic and come up with different discussions on it.
I hope this helps. Angie is away on holiday at this time.
I believe that one answer to your question is that there are varying styles of skinny jeans. Some are very tight at the calf and some are more of a straight leg jean. Rather than thinking that some body types cannot wear skinny jeans, you may think along the lines of different body types finding the skinny jeans that suit them best.