As Salvatore enters the abandoned cinema near the ending of the film, a drawn penis can be seen on one of the dusty walls.
In the extended edition at the end Salvatore meets Elena in a car and they kiss. Sex is implied but not shown. Later she tells him that she did it with him because in their youth they never have sex before.
A woman is shown breastfeeding her baby in the cinema.
A row of boys appear to be masturbating in the theater to an erotic film, and are shown from the waist up. (We see a completely nude woman lying face down for a few seconds... no graphic nudity.)
A man in a theater is seen spooning a woman standing up and fondling her covered breast, and from his thrusting motions it seems a little more is going on.
There are many scenes of passionate kissing from old films, and a few VERY short (less than 1 second) topless scenes. Bare breasts are shown.
In the extended edition, we see teenage Salvatore encounter a man having sex with a prostitute. Thrusting is shown and heard and the man is wearing underwear. We soon hear him yell in orgasm. No nudity.
Also in the extended edition, we see teenage Salvatore having sex with a prostitute. His pants are shown down sideways, and his face grimaces at a clear orgasm. No nudity.