One night at the Simpson House, Marge is feeling frisky, but Homer isn't in the mood. He hasn't been in the mood for months, and that irks Marge. The next morning, Homer is watching TV, still annoyed by the fight the night before. He catches a glimpse of something interesting on TV, x-ray glasses! He quickly reaches for the phone and urgently places an order. A few weeks later, the package arrives and Homer couldn't be more happy. Later that night, while asleep, Bart rushes into his parents' bedroom. Homer and Marge wake up surprised, and Homer realizes this is the perfect opportunity to test out his new purchase. This explains why Homer and Marge have been having bedroom problems.