I just play him as myself, I don't ease myself into any role really. I stick a beard on and play me.
The quickest way to defuse fear or insecurity or anger is usually humor. I think comics figure that out quickly, and, once you figure it out, you think, 'Hey, if I can do this and get paid, that would be kind of cool.'
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.