'Georgica' by A.M. Homes.
'In "Georgica," a young woman patrols the sand dunes of a local beach. No notions of privacy are entertained, she spies on couples, hopeful they will engage in sex. She waits and is often rewarded with exactly what she is seeking, a used condom. Neither a voyeur nor a spy, she wants the condoms and their contents, the possibility of new life, for her own use as living for her has become a ritual of seeking and planning. '
If you haven't read it, you need to. C'est tout.