Jeanette Winterson, Sexing the Cherry.

Not a very characteristic passage, though hard to forget if you have read it. Jeanette Winterson is also the author of Oranges are not the only fruit, and in due course will presumably also write books called Yes, we have no bananas (as the clue suggests), I've got a lovely bunch of coconuts, Strawberry fields forever, and so on until the supply of fruit runs out.