The Simpsons S31 E07 Livin La Pura Vida

"Just a product of society that's lost its good manners."

The Simpsons join other Springfield families on the Van Houten's annual trip to Costa Rica, which they obviously can't afford. While there, Homer befriends Patty's new girlfriend, Evelyn, and Lisa tracks down the real reason the Van Houtens can go on this trip every year