Stick your cock into the hole.

You step up to the stone panel and stick your cock into the hole. The stone blocks beneath your feet sink slightly, and you hear a grinding and clicking noise from the walls around you. Then something wraps itself tightly around the base of your cock within the stone panel! You try to pull your cock out of the hole, but the thing seems to have locked your cock inside the stone.

The grinding continues loudly from beneath your feet. You look down to see a column of stone rising up from the floor. At the head of the column is a carved stone rod about two inches across ... and it's aimed at your ass! As the rod rises to touch your asshole, you reflexively raise yourself up on tip-toe to get away. As if on cue, the entire floor around you begins to sink. You realise you have **** but to impale yourself on the rod. You groan as it pushes through your sphincter and slides up to press against your prostate while you sink down onto the stone column. You cock, still trapped inside the stone panel, hardens and twitches as you squirm on the rod in your ass. Your hands search for any hand-holds on the panel, but there is nothing to help support your weight on the stone rod.

Shifting about on the stone rod only makes you harder and more **** to cum, despite being unable to touch your cock. Unable to hold it any longer, you cry out desperately as you feel your balls pull up and your cock shoot its load deep inside the stone trap. Then you feel yourself slip into unconsciousness...