I saw this movie when it first came out. The theater was in a small town and there was nothing else to do that night so we went to the movie thinking it would be crap. Instead, I laughed so hard I almost fell out of my seat. I've loved the movie ever since.
Everyone knows the premise---Michael Caine and Joseph Bologna take their teenage daughters, Michelle Johnson and Demi Moore to Rio for a vacation. Caine's marriage is in trouble and his wife is vacationing somewhere else. They're barely settled into the home they're renting when Johnson aggressively pursues Caine and he quickly succumbs (like any man would!). Caine is guilt-ridden but cannot resist Michelle's considerable charms. Her father finds out about the affair and goes nuts trying to find out who her lover is. He enlists Caine in his search and many hilarious scenes ensue.
The setting for this movie is just gorgeous and the women are even more beautiful. This was Michelle Johnson's first movie and it shows but she does project a sweet sincerity and her va-va-voom body more than makes up for any performance shortcomings. Zowie! Catch the scene where the fathers find their daughters topless at the beach---this was well before Demi Moore had some "enhancements" later in her life and it is painfully obvious that she's extremely embarrassed by doing the topless scene. Michelle is a trouper though, lucky for us!
The ultimate reason to see this movie though is Michael Caine. He is extremely funny in this movie and I can only imagine how much fun he had making it----a guy in his 40s getting to spend a few weeks in one of the most beautiful and exciting cities in the world and having all these love scenes with a girl half his age and getting paid to do it!!! Caine has made a lot of schlocky movies, for sure, but in an interview once he said that no matter how dumb the movie was or how cheaply it was done, he would try to give the best performance he could so even if the rest of the movie was crap, the viewer could at least appreciate that Caine did a good job. That dedication to his craft is what lifts what should've been a "C-" movie like "Rio" into a "B" "B-" movie instead and when he's in really good material, makes it unforgettable.