A kiss can be a comma, a question mark or an exclamation point. That’s basic spelling that every woman ought to know. – Mistinguett, quoted in Theatre Arts, Volume39, Issue12, 1955

Linguists are no different from any other people who spend more than nineteen hours a day pondering the complexities of grammar and its relationship to practically everything else in order to prove that language is so inordinately complicated that it is impossible in principle for people to talk. – Ronald W. Langacker (b.1942), Language and Its Structure, 1973

Mr Speaker, I said the honourable Member was a liar it is true and I am sorry for it. The honourable Member may place the punctuation where he pleases. – Attributed to Richard Brinsley Sheridan (1751–1816), responding to a rebuk

I have spent most of the day putting in a comma and the rest of the day taking it out. – Oscar Wilde, variously worded paraphrase, see quoteinvestigator.com/2015/10/25/c