All in Good Taste (1983)

Let's be clear: Jim Carrey's face may be on the box cover of this movie, but Jim Carrey is only in this film for about a minute. That's just enough time to catch a long glimpse of his bare butt and junk, though, alongside an equally nude Jonathan Welsh as they run through a nudist colony. But perhaps I should back up. 

Jonathan plays Timothy, a filmmaker with a very wholesome script about a little kid and his German Shepherd, both look for a family to take them in. When he brings it to investors, however, he's forced to add sex and violence to the plot, eventually taking him through nudist colonies filled with naked men and women (like the guide Carl Alkerton, who knows cock, balls, and butt) before ultimately turning his movie into a tale about strippers. What do you know? That's our favorite kind!