With the door locked, a burly, hairy-chested man lets out a low groan as he grips his massive, throbbing cock. He's got a mission - to fill his tighty-whities with a hefty load of cum for his buddy to enjoy later. His strokes are steady, his breath heavy, as he imagines his buddy's eager hands and mouth on his thick, veiny shaft. He teases his sensitive head, feeling the pre-cum ooze out, before picking up the pace. With a final grunt, he unleashes a torrent of hot, sticky cum into his underwear, the fabric stretching taut with his load.