Missed connections

Hobo, why so many bags? What is in these bags? How do you get so many bags on the subway before STAND-CLEAR-OF-THE-CLOSING-DOORS-PLEASE-BINGBONG-CLICK? How do you carry them all around when you get off the subway without a shopping cart or a dolly? Why are some of the bags so dirty? Is there dirt in those bags? Because it smells like dirt. How come some of the bags aren't dirty though? How do you pack them so well that they stand up nicely like that?