Your dick gets more and more insensitive. Some day you cannot get off inside a woman anymore, because you need such a strong level of friction that only a hand can create.
Most people start "enjoying their own company" years before getting to try for real.
If there was a question of insensitivity, then surely problems would be much more prevalent at ages when people are enjoying themselves more frequently. But it's not the case at all.
I get what they're trying to say, but they also carefully omit very important details. There are a lot of things that can be unbelievably bad for you, but essential in moderation. This is really no different. If you aggressively jerk off 15 times a day, obviously you are completely screwing yourself in multiple ways, but in moderation, it's good for your body
It's also at an age when your libido is essentially unlimited. Were the opportunity to present itself, these people could adequately perform for 15 different partners in a row.
Desensitization takes time. By the time it sets in, most people are past the age of unlimited libido. There are also different forms of sensitivity (and thus, desensitization). OP referred to physical, but mental seems to be a more common issue.
Endurance by reduced sensory input could also mean reduced pleasure.
Endurance by enhanced self control is what you really want, because then you can get more pleasure overall. It comes with age and practising (the real one).
It's also like saying that eating too much makes you not hungry, no shit einstein
if anything i'd posit that cranking the hog makes you more sensitive, because you'll be so used to it that abstaining for a week is almost unbearable, much like how most people in developed countries feel a pit in their stomach if they don't eat for half a day.
Thank you Mr Science, for the claim of addiction to a chemical produced by the body. Very smart.
Citation needed, literally everyone's got different equipment. Some people are more sensitive, others less. Some people get piercings in their back to increase sensitivity, others are already so ticklish they shiver just from the touch.