In Judaism, there are 613 biblical commandments, and the Talmud says that the chief commandment of all is study.
I don't know how one actually would define obscenity. I'm sure the definition is different according to the age one is living in.
I discovered the 7th art at home when I was kid, through Charlie Chaplin's movies and those of my father who shot documentaries. He was my biggest influence. So I took his camera and started shooting.