*Never attempt to teach a pig to sing; it wastes your time and annoys the pig.* [*Robert A. Heinlein*](http://www.goodreads.com/author/show/205.Robert_A_Heinlein?utm_medium=email&utm_source=quote_of_the_day) Decades before the waterbed was patented and popularized in America, science fiction writer Robert A. Heinlein (born July 7, 1907) described them in detail in his books.