When Mr. Rosen could not find anyone to republish some of his older, more obscure books, he decided to, for the public's eyes, have his son film him telling all of the stories from the books, including but not limited to "Hypnotizer" and "Michael's Big Book of Bad Things". In each of these series, Mr. Rosen would have himself filmed wearing the same outfit in the same background with similar title captions (likely one day for filming, and his son deciding to make it possess a clean sort of transition).
Mr. Rosen became popular when some very clever users on Youtube took advantage of the fact that one could sentence splice his videos due to them having a similar background/camera position, and not have to change many of the visuals present, making it very easy to make him tell rather vulgar, but hilarious, stories.
"Once, I was a smuggler, and I had to get 20,000 pounds of crack through the customs! I chose to hide it on me somewhere... but where? 'I know!' I said, I'll stuff it in my BUTT. -PFFT- OWWWWWWWWWW"
"When I get an erection with my FAT cock, if there's one thing I love it's Ms. Goodoff's snatch!"