9 minutes in the movie, Oliver Reed is running naked to jump into a lake. We see his dick and butt from a distance.
26 minutes in movie, while in a forest, Alan Bates is getting naked. 27 minutes in the movie, Alan Bates is walking naked, and we see his butt and penis from close up.
53 minutes in the movie, we see Alan Bates's butt again.
57 minutes in the movie and for long minutes, Alan Bates and Oliver Reed both strip and start wrestling naked. We see both naked bodies from every possible angle.