It's the year 20XX in the 2D world, and the overwhelming amount of normal & wholesome 2D products is causing a decline in the birthrate.
Thus, a new project was undertaken.
It's title: The Semen Transfer Project
If 2D men can't get it done, than 3D men will have to take their place.
The government orders the creation of a machine capable of transferring semen between the dimensions,
and an android girl name Shiva is tasked with carrying out the plan.
You? You're the semen cattle whose one and only job is to impregnate.
The monitors display the 2D world, your semen's status, how the girls' eggs are doing, and more.
Watch as your hot cream gets inserted by catheter into their wombs...
What a novel way of being useful to society!