Ciske is spying on a man and woman making love. A girl douses him with a bucket of water and then the man emerges from the bedroom, takes Ciske in and throws him on the bed. He then hits him several times with his belt.
It is the continuation of the scene that begins at minute 1:05. We discover that it is not only Leo who is spying on his parents but also Ale (his sister). Shortly after their parents start having sex Leo covers his sister's eyes.
Wendy and Sandy are at band practice. Wendy is sitting center row, playing a trombone. Sandy is playing a triangle, sitting directly behind her, slightly elevated. He is intensely peeking downward. We get a brief shot from his POV, staring at Wendy's butt crack.
Exact same scene as the 2004 short film with the same name (which starts at 11:21).
A naked woman passes in front of Ben (he is fascinated by her nakedness), then the boy notices that the woman has lost her underwear and decides to bring them to her.