I read this story many years ago. Batman and Catwoman meet in a safe house, he opens the fridge and gets her a soft drink. It's hot so they lose their suits but keep the masks. She notices he's wearing a jockstrap and realizes that's why she never felt an erection when she was teasing him.
They talk for a while, about life, about love, then (maybe) have sex and finally both leave, their enemity forgotten for one night, to be resumed tomorrow.
Does anybody remember it?