The Life and Opinions of Tristram Shandy, Gentleman

As the ancients agree, brother Toby, said my father, that there are two different and distinct kinds of love, according to the different parts which are affected by it -- the Brain or Liver -- -- -I think when a man is in love, it behoves him a little to consider which of the two he is fallen into.

What signifies it, brother Shandy, replied my uncle Toby, which of the two it is, provided it will but make a man marry, and love his wife, and get a few children?