post apocalyptic, repopulate, sperm harvesting

[swfdressed4good2]

Help I am looking for a story set in dark world.

Maybe a post apocalyptic world?
I thought there was some population crisis due fall in male fertility... or maybe due to the death of so many males (maybe a virus or somthing that did not affect females)

The mane male character recounts how men are dissapear  from the streets, most never heard from again rarely one comes back longing to be taken again.

The main male character find himself being followed at night. He blacks out and wakes up immobilized with a machine attached to his body.

The machine extracts his sperm and he is forced to endure endless orgasms. Resulting in psychological conditioning, or mind breaking, or such.