Bound and eager, a submissive soloboy awaits his master's command. The master, with a sadistic gleam in his eye, selects a thick, shiny sonding rod from his collection. The boy's cock twitches in anticipation as the master lubes up the toy and his own fingers, gently pressing them into the boy's urethra. The boy gasps, his body tensing as the master expertly inserts the sonding rod, twisting and probing until it's securely lodged. The boy's moans fill the room as the master applies pressure, stretching his urethra deliciously.