Someone on radio reminded me of an O Henry story, gist of which is two old people, poor as church mice, her only ‘possession’ her long golden locks, but no comb to comb them with. His sole possession a gold watch, but no chain to hang it on.
She gets her golden locks cut off and sells them to buy him a chain for his watch.
Exchanging gifts, he gives her a comb he has bought with the money he got from selling his gold watch.