Not found in Twain's works. <br class="br">A 1993 newspaper humor column attributes this saying to Reader's Digest: "Picking it up from a Reader's Digest fan, Willie, our ex-shoe shine boy, says some politicians are like diapers. They both need changed often ... and for the same reason." <br class="br">Also attributed to Reader's Digest in Naomi Judd's 1993 book Love Can Build a Bridge https://books.google.com/books?id=AMmrqZkq3JQC&pg=PA262&dq=%22politicians+are+like+diapers%22&hl=en&sa=X&ved=0ahUKEwiQ2obup6LKAhUBS2MKHfacCmsQ6AEIITAB#v=onepage&q=%22politicians%20are%20like%20diapers%22&f=false: 'A quip I once saw in Reader's Digest said: "Most politicians are like diapers: they should be changed often, and for the same reason!"'. <br class="br">Not found attributed to Twain until 2010 https://books.google.com/books?id=gNwqfJkXjVsC&pg=PA448&dq=%22politicians+are+like+diapers%22+twain&hl=en&sa=X&ved=0ahUKEwjUq_C6qaLKAhVM7GMKHTuwAfIQ6AEIIzAB#v=onepage&q=%22politicians%20are%20like%20diapers%22%20twain&f=false <br class="br">Misattributed <br class="br">Variant: Politicians and diapers must be changed often, and for the same reason <br class="br">Source: Bill Hastings, "Books, Bricks, Nap's, Tom, , Tres, Tracy ..." https://www.newspapers.com/newspage/14184165/, Indiana Gazette, 1993-09-10, p. 11