The Look Of Whoopie

Once upon a time, I bought my niece and nephews the gift of a whoopie cushion.
My father was so amused by this, he asked me to buy him one too.
I went one further. Not only did I buy him a whoopie cushion, I got him a fart machine too.
I just found a piece of the packaging in an old case my mom gave to
My dad had saved the  "NEW LOUDER REALISTIC FARTS" part of the packaging.
That look in my eye?
It's the look of whoopie.