Or maybe, despite there never having been the least spark of sexual attraction between us, despite the fact that we could have been locked in a closet for seven hours and nothing would have happened, maybe, for some reason, Jacob is trying to seduce me.

NEWYORKER: The Region of Unlikeness

And Endless Forms at the Fitzwilliam Museum, in Cambridge, considers how Darwin's ideas penetrated the consciousness of the great artists of the era, inspiring visual representations of the struggle for existence, of natural attraction and sexual selection, and the origin and descent of man.

BBC: Friday 11 September: Darwin special

Others suggest that couples who delay or abstain from sexual intimacy early on allow communication to become the foundation of their attraction, and that this helps to ensure that companionship and partnership keep them together when the initial flames of lust die down.

ECONOMIST: Chastity before marriage may have its uses after all