There's a lot more than 2 grams of fat in a slice of pizza. I've tried it before because Ulillillia's pizza degreasing meme has lived rent free in my head for like a decade, and I could easily soak a couple of paper towels in pizza grease from just a slice of pizza.

Apparently, all he ate were pizzas, so it wasn't just one slice he was degreasing, but whole pizzas.