I tried to find the volume of my friend's dick assuming it's the shape of a parabola (for the sake of an easy equation). My final answer was approximately 2,850 cubic inches, which seems unreasonably high to me. Does that seem right?
x=(-y^2)+6, x=0, rotated about the line y=0. Pic related.
I'll post my work too (featuring my ungodly handwriting).