You are in the same bedroom where you were a few moments ago, but this time you are lying in bed. Just to make sure, you feel between your legs, and are shocked to find that, not only do you have a penis again, it is fully erect.

The door opens and a young and beautiful woman walks in. "Honey, are you ready yet? I don't have all night."

"I'm ready," you say. You notice that she looks familiar.

She takes off her robe, and she is totally naked. She crawls under the covers and snuggles right against you. You realize that she is you, or you had just been her a moment ago. Which means you are now her elderly husband. She grabs your erect penis. "You sure are ready," she says.

You have sex with her and you enjoy it, except that something is wrong.