Do you know the name of this movie? Plot: A guy and a chewbacca travel, go on a boat into a cave, find a world w/ girls

Hi, I remember watching this movie around 10 years ago, but I can't remember the name. So here's the plot: There's a guy and a chewbacca who are traveling. At some point in the movie they find a store where this guy is selling useless trinkets and stuff. Such as coffee mugs with boobs on them sculpted and painted on them. There is also a large model of some theme park or town and the guy who owns the store is bargaining with the two main characters to sell it to them. Later in the movie, the two people and the store guy travel down a cave in a boat that floats along the water. They end up getting into a different world, which is made up of desert land. They get into a village, and in the village they find a bunch of scantily clad women walking around. Some stuff happens, and then the guy and the store owner are going to go home, and the chewbacca says that he's decided to stay in the world with all the beautiful women. And then the other two guys travel back and that's the end. I am also pretty sure that this movie is a comedy, because they crack jokes at points in it. If you know this movie then I would really really appreciate your help, THANKS!!!