It is 12 foot long. Each plug of the 9 different sizes either glued in or strapped down. Everyone has a different diameter tubing attached to its base. All tubing runs behind a wall with a small window. The observation window has full view of the board.

The first subject a tiny busty 18 year old female freshman from a local college. Answered the add in the college day paper for “ test “ subjects $50 per day. She had no idea what lyed before her.

She enters the room and the door is quickly but firmly locked from the outside. She is totally naked. Her 38 D’s barely covered by her arm. Her freshly shaved pussy also covered by her other hand. The window slides open and the voice from behind instructs her about the bench .

“All subjects will start at the smallest plug first . A timer will start once full insertion has happened . After a period of minutes the fluid flow will start. At no time is the subject to leave its present filling plug station until a proper removal of and expulsion of bowel contents. Only once cleared the next sized plug is taken.”

As she takes her postion over the smallest butt style plug it enters her ass easily . The base girth did snap shut around her tight hole thus blocking a reverse flow. Minutes later the light colored thick viscous fluid slowly begins to flow inside her quivering asshole. Her pussy juice slickness drops out of her. More and more fluid until the ending ounces push into her . A quart of very soapy mix. She’s gasping from its pressure . Her first orgasm and cramp hit at the exact same time. She screams and cums hard. Then the bell goes off and she must remove from the plug.

It slides out, another cramp hits her colon and what followed was the dirty shit filled continuous flood from within her lower bowel.

The next size was a girthy large black dildo. No base snap back just 10 inches of black semi hard rubber. It tubing a bit larger in diameter. She begins to fill her ass with its length easily. All 10 inches quickly planted within her ass cavity. This time she has an anal orgasm just as the 2 quarts of salt water rinse proceeds into her.

It’s gonna be a quick fill of less than 1 minute. Her orgasming anal cavity quickly and easily take the entire amount. She cramps and cums again. The 10 inches of ass planted dildo is quickly removed. A cramp and out comes the fluid and a bit of dirty shit filled water.

Third up a monster of a regular type butt plug. Insertable length of just under 16 inches. Again it slides in a orgasm a gallon of water, it’s quickly removed , she expelled and onto the next.

So far she has taken 3 of the 9, the 4th would be a challenge. 20 inches in total insertable length. It head round and large. It had been prelubed with a mixture of glycerine and Vicks vapor rub. Half way of its length had a larger bulbous “ knot”

As she began the initial insertion the lube of Vicks and glycerine made her insides begin to burn. As the inches entered her the “ knot” pressed against her anal ring, but it’s girth wouldn’t pass through... Yet.

Her total body weight forced down but to no avail, only half way inside it was fully stuck. The window slid open and the voice said “ you must fully insert, some have to ride said phalus until fully inserted.”

She began to ride the monster. Pulling almost completely out and back in. Suddenly without a warning her burning anal cavity explodes in an assgasm. Her colon relaxes just before her massive ass orgasm and the bulbous knot passes through her twitching outer anal ring. She growls. The entire length surprises her as each inch blasts into her quivering ass. The final inch bottoms out and the fluid flows. Slowly at first. It fills her completely, 6 quarts, her stomach looks about 5 mouths pregnant.

As it churns inside her a massive cramp hits but it doesn’t go anywhere . 15 minutes before expel. Waves of cramps build within but none crest through. Until the 14 minute mark. The crampgasm that hits is massive. Her pussy shoots out a good amount of woman juice, her clit explodes and the full 20 inches rockets out followed by a gallon of clear liquid. A full 2 minutes of assgasm expel. Then a final deep cramp and the last 2 quarts leak out. She has taken 4 of 9 and expelled over 3 gallons of liquids . On to the next.....