I have just watched some great videos on youtube.. they show pickpockets in action in Rome, Barcelona etc, and the most of the scnerios/ methods they show are same as they use in Paris.. very very helpful for my naive boyfriend to see. I tried explaining how you can't let groups of youngsters surround you, how sometimes its harmless looking women and children etc.. He had a hard time believing me when I said he had to harden his heart to sweet young girls asking him for help etc.. but these videos really opened his eyes,, women wearing babies on their chests pickpocketing etc.
Anyways., sorry I don't do links,, even though many have tried to teach me how, but its easy to find them, just literally google "youtube pickpocket videos" .
Really worth watching for anyone who is not familar with this type of crime .. also features a few cons..