This machine stops after..... [NSFW]

So a son invites his father to come visit England from India. The son was very excited about his father visiting England and so he decided to take him on a tour. Unfortunately his father didn't show the same excitement like his son. The boy was confused and asked his father "What is the matter?, don't you like the city, the tall buildings, the people?", his father replied, "Well I'm a farm boy, and these modern stuff never caught my attention, take me to some of the farm's here, that could be interesting".

So without delaying the boy took his father to a farm, that cheered his father up. Among everything at the farm, the boys father was very amazed and interested in the automatic cow milking machine. The boys father look at his son and asked him to send one these machines to India, he said "I'm a old timer now, I can't milk the cows at the farm in India, maybe these machines could help".

The boys father went back to India, few days later the automatic cow milking machine arrived. The machine did really help, saved lot of time.

On one fine morning, the boys father was very happy and cheered, he was going to start milking the cows and get things done as usual. He looks at the machine and gets a nasty though. He thought " What would happen if I insert my penis in one of these pipe?". To answer it, he sits on a chair, grabs the pipe and shove his penis in, the vacuum instantly pulls his penis down, which felt very comforting to the old timer. He grabs a newspaper to read while the machine did the job of his hand.

Few minutes later, he was done, he had literally masturbated with help of the machine, he decided to quickly get to work. He grabs the pipe and pulls it down, Nope it din't come out, his penis was stuck inside the the pipe due to the vacuum, he was tired, and the machine didn't stop. It happened again, he ejaculated for the second time, this got him very angry and tired. The pipe won't come out.

He screamed for help, but no one could hear him with that loud sound of the machine. He was sweating and screaming for help, he quickly decided to call his son to England. He quickly tell his son about the whole situation and that the pipe wont come out.

The boy was angry and screamed "Din't you read the manual?, it clearly says that "This machine stops after 5 Liter"....