In one quite lengthy sequence, Ana is shown thrusting on Marcos violently. They both talk sexually while doing so. Both of them sre fully nude though no genitals are visible. The camera then slowly fades and cuts away from them. In the next shot, Ana gets tired and gets off Marcos, revealing his erect penis. It's implied that the sex was unsimulated. She then lies beside him. The camera then closely focuses on their genitalia.
The movie opens and closes with an explicit fellatio scene; in which a woman is clearly seen with a man's (prosthetic) penis in her mouth.