Sister of Mine (2017)

Man views porn website on laptop showing thumbnails of explicit nude videos including male genitalia. He then watches several videos including an overhead view of a woman on her knees having intercourse with a man and man unseen filming. He recognizes this woman. He then joins his girlfriend in the shower and begins french kissing, presumably leading to sex.

Full frontal male nudity.

Man watches video of woman having sex doggy style from POV of her male lover (he's not shown). Her butt is visible.

Multiple scenes where they're smoking cigarettes. There's a few scenes of drinking including one where they insufflate cocaine around a table in a club.