The hair on your chest goes down into your pants. Pulling them off you see you are no longer human down there.
Your dick is now hidden in a large furry sheath and below your balls are also covered in a light fur.
In disbelief you reach down and touch your sheath bringing a shock of pleasure to your brain. After another stroke you see your blood red cock tip emerge, it looks nothing like your old dick, the head is pointed. You massage until it has completely removed itself. The base now has a large bulge, your new knot!
Pleasure intense you continue to rub bringing yourself to the edge.