I think (because I'm a fujoshi, so female lol) it's because it's painful, if the guy can't come he gets kinda desperate and then finally relax after a long time. Not more pleasure, but I think he can enjoy more because it was denied for some time. Plus, some people get excited with pain and enjoy it even more. And the partner feels dominant because he can choose when his lover can come.
Learn what shit - Learned the penis tying off trend from yaoi I've read. Personal experience with my own dick accounts for my claims as to the physical sensations. Unless my dick feels different than your own? I ask the question to gain a greater understanding of other people's point of view/personal experience. I am already aware no everyone reacts the same to stimulation, so share your experience?
but you orgasm regardless of if it's tied off or not. It only stops the sum from leaving the urethra, it's already poured out from the testicles and is just backed up in the vas deferens or urethra. Pain is understandable, but not a fan of pain in my genitals. So peak pleasure should have already been reached upon orgasm... then pain until untying and allowing the ejaculate to leak out rather than shoot out.
SERIOUSLY... what is the fascination with tying off the urethra?! it doesn't stop orgasm... all it does is stop semen from coming out while tied... it just builds up and leaks out later... and it isn't more pleasurable when untied just because it is leaking out... Is this some fujoshi confusion not understanding the male anatomy or can someone please explain what the fuck is going on?!