why do men eat so much?

In my house there is my husband and roommate. My husband works but our roommate does not. Both of them eat so much. My husband takes three sandwiches and granola bars to work for lunch. Our roommate buys pizza pockets and take four of those for lunch.

Yesterday, I bought 9 pizzas for dinner. I wanted them to last a couple days for leftovers so I did not have to make dinner since I will be busy. I had three slices yesterday while both my husband and roommate had a box to themselves. Today for lunch I took two slices and went to get some for dinner but all nine boxes were already gone. I had maybe a half a box, so where did the other 8 and half boxes go?

I was so angry that I told them to begin buying their own food. They looked so guilty that I felt bad for scolding them but they are eating more then I make in a month. (I work part time and go to school).

Anyway, so why do they eat so much? I have even seen my brother fill his plate fuller then it can handle. Where do they put it all?