Shopping for jeans, it has to be said, is not my preferred past time. Hours spent browsing through racks of jeans, trying to find the right size, length, or cut, could be better spent elsewhere. Whole libraries could be built upon the types of jeans which have evolved over the past 140 years, since the cowboys started wearing denim in the 1870s. So, when I do go jean shopping, I try to pinpoint exactly what type of jean I am looking for before I start. Most popular at the moment are jeans of the slim cut variety. I’m talking skinny…