Nope Ron Jeremy is not a joke.
He is a legendary porn star that did most of his work back in the 80's, and early 90's.
I think now he mostly directs these movies and does guest appearances.
Ron Jeremy is too porn, what Eric Hartmann was to WWII Aviators.

No joke.
Not that I'm into porn, but I had a buddy in high school who was the porn watching king, and I caught a few now and then with him.
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Vermillion
**MOL**, Men of Leisure
"Real Men fly Radials, Nancy Boys fly Spitfires"