「Inject lubricant deep into the urethra, block the urethra with a metal rod, seal the meatus with tape, and finally complete two orgasmic ejaculations.」
Just to satisfy his perverted curiosity, my cock was almost ruined. He wanted to see whether retrograde ejaculation would occur when the urethra is completely filled; whether the body could absorb the semen that couldn't come out. He also said that ruining a worthless waste cock at worst is no loss.
At the moment of orgasm, I felt like my entire cock was really about to be stretched and broken. It kept ejaculating inward, but the semen couldn't be expelled and was forced into the bladder, spasming wildly amid the unbearable holding-urine-like discomfort and pleasure, so good I could barely stand. My right hand supported the desk, left hand continued stroking; during the second orgasm, the urethra and bladder finally couldn't bear it, a large amount of semen was forced outward, shooting fully onto the inner wall of the tape.
In the evening, he sent a message, his tone full of dissatisfaction: "You dog slave can't even manage your own dog cock, casually discharging and ejaculating like a horny wild dog, completely failing to accurately complete the task. Tomorrow I'll send you to others for proper training, to undergo thorough transformation and domestication."
(I had thought about calling the police, and also thought about blocking him directly, but still never took action. From the initial pure fear, to now... my body and mind seem to have slowly adapted, even starting to sink.
Under his threats and commands, my number of orgasms and ejaculation volume are ridiculously higher than before. I can't tell if this is pleasure, or if I've really been thoroughly transformed by him... In the end, should I continue like this?)