Well spotted Kalee20!
Beginning a sentence with a conjunction when I was at school was verboten in every sense. You could receive a severe castigation from not only your form teacher but, if you persisted, a thrashing from the headmaster. Apparently it is accepted practice these days & in the past.
And let every other power know that this hemisphere intends to remain the master of its own house. (John F Kennedy)
I've had a perfectly wonderful evening. But, this wasn't it. (Groucho Marx)
I'm afraid I still find the new trend of beginning nearly every sentence with "So...." puts my teeth on edge.