When I was about 12 years old, I could eat a whole Pie ( 8 slices ) no problem
You figure as you get Older and Bigger.. you could eat More..... Not Me !
4-5 Real Slices of Pizza is the Max... I'm Talking NY Slices, not those Domino's size slices.
* Oh, and for the Record.... an 18" Pie is not a Large Pie here in NY