All that extra mass had to go somewhere.

In the silence that followed the slaughter, Link struggled to understand what he had just done. He had...eaten them. It wasn't as if he particularly liked bokoblins, but that didn't mean it was right to devour them. There was something wrong about that. Then Link looked down, and saw that the morality of the situation wasn't the only thing he had to think about. Those bokoblin's had each been about half his size, and all that mass had been turned into slime, and needed to go somewhere. His slimy breasts had grown quite a bit larger, and were now each the size of a cantaloupe. His ass had gotten bigger as well, looking thick and juicy in a way that Link knew many men found quite attractive. Most of the mass, however, went to another place. Where once his waist had been thin and svelte, now Link's belly expanded out into a soft tummy that stuck out several inches, pooching out above his hips. Overall, Link was about twice his previous size.