I think all these gay/straight comments completely miss the mark. Men have things to carry around that surpass the capacity of pockets alone. Ergo, carry an appropriate bag of some sort. Find a stylish one that you like, and carry it around. I carry a Mountainsmith lumbar day-pack by it's shoulder strap most of the time: suits me fine; it's functional for city events, and I can repack it and taking it hiking or travelling. I carry a notebook, planner, cellphone, Swiss Army Knife, sunglass clips, documents and a number of other things. But then, I like to be prepared.
When I was in Paris, France, men were carrying leather satchels of all sorts around town. Looked great. Frees up the pockets for a more trim profile.
Suggesting that anything involving carrying a bag is potentially "gay" reveals one's own sexual insecurity. Don't succumb to America's hang-ups, do what works for you, other people be damned.