The mathematical pun here is absolutely delicious—possibly more satisfying than the pie itself! In trigonometry, the sine of π (sin π) equals zero, which creates this brilliant wordplay between dessert pies and mathematical π. So technically, you can devour an entire pie guilt-free since the "sin" involved literally equals zero. This is the kind of justification I use when reaching for my fourth slice during math department meetings. Your waistline might disagree with this logic, but hey, mathematics has spoken!