When I lived in Italy I saw a lot of pretty cool man-bags but my current GF won't let me carry one, despite the fact I read voraciously, have 2 phones, carry a tactical flashlight (about the most serious thing you can pack for self-defence in the UK without the police taking an interest) wear glasses for anything involving close work (reading, PC use, watching TV) and have so many loyalty cards for various places that I have a full card-wallet for them.
But oh no, can't have a man-bag. So I have to have a backpack. Which of course I proceed to fill with junk I might need. Novels, textbooks, laptop, Thermos full of tea, First Aid kit...I hardly even need to lift weights anymore, since I carry a good 45-50lbs of stuff on my back at all times, which constitutes a pretty good workout for my shoulders, back and legs...