Fluffy Stuff Puns

So my dad and I are trying a pomelo for the first time. He's cutting the peel off and it's quite thick. I ask:

"What's that kind of, fluffy white stuff on the inside of the peel called."

"It's called the pith." He responds

"Oh ok."

"Oh pith off!"

We stare at each other and just burst out laughing.

Good times.