I recently got into phone chatting with this guy who brought up the whole fantasy in my head again....each time we spoke it got more kinky, but this is basically how i remember it.....
we imagined that sperm was like a delicacy, and we started a farm, recruiting guys like you have conscription in the army, going round army bases and colleges, arranging to inspect guys after sports or whatever so they could be put through the showers and lined up for inspection. We'd select any that had even slightly an erection, and any with big balls or cocks. They'd be happy to be chosen, it would be like an honour, and the selected ones would be led out naked onto a truck and taken to our farm, they'd all be quite turned on in the back, excited and nervous. They'd be told that's the last time they'd be wearing clothes, and from now on, they were essentially a cock and balls, producing milk for us to sell on.
We'd load them out at the farm and they'd go into a barn for newbies, where we'd weigh them, take all their measurements, shave them all over, and tatto a number or code onto them.
They would then be trained for a day or so, and it would be made clear that they cannot masturbate themselves or eachother, no sucking or fucking, and that the only time they can cum is when they are milked once a day.
They'd be put on a high-protein diet and given hormone supplements to get a really good yield, and this would make it really tough as they would be constantly horny while they get used to the new diet, but they'd get used to it and soon only get erect just before they are due to be milked.
If they ejaculate outside of milking, they would be punished by being tied up for 3 days without being allowed to cum, which would put them off and they would generally learn after the first time or so.
We imagined that they'd be kept in large barns, all together, with some exercise equipment but they'd all be focused on producing good spunk so they'd spend time exercising and burning off energy as they'd have lots of testosterone.
At milking time, they'd all be let into a corridor, and follow eachother into another barn where they lined up on all fours, and male fully-clothed staff pulled their cocks back between their legs and milked them for up to an hour, holding them back when they feel it's too close. Each staff member would get to know the contours of each cock and how it responds to touch, and would know how to get the best yield out of each one. The sounds of all these guys moaning like oxen turned me on so much.
I only met a couple of guys who were into this fantasy, I can't decide whether i'd like to be the one who was milked or the farmer!