You're gonna wanna sit down for this one. Due to the popularity of Sport Fucker's Thunder Plug, they went all in and turned it into an asslock!
The plug TAPS your prostate as you move, there is a three part interior which creates a deep, penetrating thud. When worn for an extended period of time, the constant and steady tapping on the prostate will slowly and steadily cause your cock to throb. New to double penetration? The thin neck is a good starting point to give it a try with your favorite friend.
Protip: Asslocks are a great tool to help bottoms maintain an erection for topping!
Made of medical grade silicone.