Well, for all you minimalists, I suppose you can get everything in your pockets, but for an obsessive-compulsive ER Doc, who is prepared for nearly anything (I listed what I carry on another thread, and one poster said it reminded him of the 12 days of Christmas), pockets are not enough.
I carry a ....leather bag. It is called a musette bag from Coach. It strongly resembles the leather US Mail Pouch I carried for several years.
OK, OK, IT'S A PURSE!! What's it to you, anyway!! YOU try fitting a 3 Dcell MagLite in your pocket. Plus a lot of other things. Manly things. Knives, occasionally guns; stuff like that. Photon lights. Check book.
Viagra (I keep forgetting to send it to Mike Turber)
If you are secure in your masculinity, the Doc says, check it out. Walt