Human Milker-o-matic

A pair of tubes in the girl's washroom, sucking milk from their breasts upon them being placed on it, and using half of it gained to make a drug, going in through a 3rd tube forcefully into the girl's mouth. This drug enhanced their breast size, the quantity of milk inside, and makes them act obedient, extremely orgasmic, and stiff to the point where they may be unable to move. This generates near infinite amounts of milk to be sent to the market.

That's why you don't ask how the sausage is made.

Girl1: Do we dare to try it?
Girl2: I say we do it on the count of three.
Both: One, Two, Three!
Later...
Boy1 and 2: (Locks Girl's Washroom door)
(Faint moans heard in a bathroom in the middle of nowhere, being sucked into the factory to make the milk, all stemming from the Human Milker-o-matic

Human Milker-o-matic

Something located in the womens bathroom. It will suck all milk out of their breasts within seconds. After this, it turns half of it into a chemical that will then be injected into the woman's mouth, that will make their breasts expand and make them obedient, relaxed, and rather stiff, generating near infinite milk.

That's why you don't ask how the sausage is made.

Person 1: I see a Human Milker-o-matic.
Person 2: Could it really hurt to try?
Later...
Person3: (Locks bathroom door)
(Faint moans heard from the bathroom)