Found the evidence

Buddy, you should have wiped your mouth after eating snacks from the cupboard without me knowing

because I can see some evidence right there around your mouth.

I should have a lock for that cupboard…

or maybe not so you can eat all the calorie-ful (that's a word, right?)

snacks there so I will not be tempted to eat them just because I don't want them to go to waste

but then they go to my WAIST!  Ugh!