8. How Do Thai Girls Eat So Much, Yet Stay So Thin? - Almost all Thai girls are thin. But....they can put away more food than a lot of full-grown western men I know, and still stay the same pencil-like shape. How is this possible? I eat a normal amount for a woman and seem to gain weight all the time. My Thai female friends eat twice as much as I do but are half my size. Seriously, how is this possible?