A classic - my mom used to laugh every time she heard it. She loved Shelly Berman too.
Just think of all the great comedians back then, and not one of them used a four letter word.
It was a different world and culture. I will not blame the obvious targets like Redd Fox and the others but instead the society that coarsened to accept such language. It was one thing that even the great comics had, two routines, one for the daytime and family shows and the other for the late night and adult-only audiences.
I think that the divide was in the late 60-70s era when the TV, Radio and Movie execs thought that they had to get 'Hip' and allow the "cutting edge" humor that grew with the riots and anti-war crowd. Now even very good comics seem to be unable to have a routine that I could not watch without wincing. A SHAME!