There are two explicit sex scenes between Stevie and Nikki. Female breasts are clearly shown on those scenes. However no genitals shown in above scenes.

Nikki walks by fully naked; bare buttocks can be seen and side nudity is shown along with his pubic hair.

Nikki slowly Unzips Stevie's tight jeans a bit and stick his hand under a woman's jeans and is sexually pleasing her as she holds the binocular. She sighs amorously. No nudity is shown as they remain fully clothed.