The Big Bang Theory Review: "The Skank Reflex Analysis"

I love The Big Bang Theory! I was extremely disappointed in the debut.
For once we get a nice, clean, funny show on TV and now it's gone to not only innuendo's but actual bad language and story line.
I guess I'm a prude but proud of it. Why? Why is it all so necessary? It certainly didn't need to sell it to the public as it was one of the top shows.