Why are American soldiers so fat?

>be in Australian Army
>be in Asia
>a group of five of us go to some spa thing
>some American Soldiers are also there
>in the hot communal baths
>they are making fun of Asians, we are talking malnourished sub 5'5" twig people, for having small penises
>one guy in our group says "well at least they can see their penises"
>we all laughed at the Americans
>asian guy asks us what we said
>tell him the joke
>he yells it out in "asian"
>whole place laughs at the Americans
>they get mad and start yelling about how they have 9" dicks (sure, if they quadrupled in size, these were not well endowed people even in the warm bath)
>the guy says "sure, 9" wang, too bad you have 20" of stomach to get to girl ahahaha!"
The American military had to pay for the dental work the guy needed as well as a settlement, American GIs are banned from the spa