Can you keep hamsters in your pocket?

Sure you can. But you shouldn't. It's not suggested by most pet folks 'cause it's easy to injure them in a pocket. If you forget you put them in there and do something, you can crush or otherwise hurt them. We're not used to moving around with a little living critter in our pocket. That's why it is a bad idea. If you want a picture or something like that, go ahead. But remove the little furry beast as soon as the shutter clicks.