Alone and eager, a man with a big, usually soft cock decides to pump up the volume, both literally and metaphorically. Sliding his thick member into a specialized pump, he begins to work, his dick swelling with each compression. Pre-cum leaks from his slit as he strokes his now rock-hard erection, his body tensing with pleasure. The pump's clear cylinder allows him to watch his cock's transformation, driving him closer to the edge.