Noticed tonight (after too long out the game, forgot how much fun it is (when Jack isn't being a haxxor noob and killing me that is)) that you can pick stuff up, like gamegirls, lona misas and packets of fags

What exactly do they do in standard gameplay? Normally I would stick them in my backpack and die whilst doing so, but what else do they do? Can I light up after a successful kill? Do I have time for a quick game of tetris? Do her eyes really follow me across the battlefield?
*Sorry if this question has been asked and answered, but I'm just a poor boy, I need no sympathy.........