Like This — Emma Hillman

One day, David dares his girlfriend, Lily, to spend the weekend naked. She agrees, but only if he does the same. However, by the next Saturday morning, she's forgotten all about it. He finds her in the kitchen and reminds her of the rules, quickly undressing her before showing her why obeying him is the right thing to do.

When they have a guest over the next weekend, however, and David still wants her to be naked, she suddenly wonders whether that dare wasn't created for an altogether different purpose...