“(First two cells to diddle each other's genes) 'I'm only doing this, Anita, because I want your descendants to be an improvement on you.' 'Egotist.” SexEvolution Book:The Cartoon History of the Universe I, Vol. 1-7: From the Big Bang to Alexander the Great Source: The Cartoon History of the Universe I, Vol. 1-7: From the Big Bang to Alexander the Great