It has long been the case that fit young guys get modelling jobs for underwear catalogues and websites. There is also a fast increasing trend for guys to post selfies in their undies from their bedrooms (maybe they are seeking girlfriends!): then we have the tendency for some guys, notably Russians and in Eastern Europe, to regard undies as a perfectly adequate substitute for Speedos or whatever other swimwear we might expect to see in public places. We even been in gyms where guys think it OK just to train in just their undies or even jockstraps. All this explains the larger number of undies pictures which sometimes appear here so that we can be impressed and inspired by the fit bodies wearing them. That's the chests, abs, legs and arms - not the bits inside the undies, obviously - we're not that sort of blog. In today's post, exceptionally, every picture features guys in just their underwear. All of the above categories. But, as usual, it is the physique and the fitness...