The Dickstones(1992)

Bedrock City, 12534 BC. Pedro and Vilma Pinjapiedra are going through a sexual dry spell and feel compelled to look outside the marriage for satisfaction. Tensions boil over when Pablo Orgasmol and Vilma end up having a secret fling. The betrayal comes to light after an indiscretion, and his pride wounded, Pedro seeks comfort and revenge in Bety's arms. When the four meet up to settle the score, all hell breaks loose. While the women decide to tune out the drama and make peace on their own terms, Pedro and Pablo take refuge at a late-night bar, capping off the evening at a wild bash with Charly and a couple of girlfriends. The next morning, following the night of debauchery and with hard feelings wiped clean, both couples reunite at Pedro's place and decide to work things out the best way they know how.