system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is Ron Jeremy such a well-known/popular pornstar? [Possibly NSFW]

... As the title implies. How has such a relatively old, unattractive man (Just my opinion) become a famous pornstar?
gpt
Mostly because he is such an unattractive guy. He was nicknamed "The Hedgehog" for a reason. The thing is that he would be the average guy. If a guy like him could get sex from the hot co-star, there is hope for every guy to bang a porn star hottie. The other thing he had going for him was he could cum on command, rarely needing a second take for a money shot. Getting a guy to cum at just the right time saves the filmmakers a lot of money by saving time waiting for the talent to get hard again and waiting for him to be ready again. 

I listened to a radio interview he did a few years ago and he explained why he was so popular and so often cast.