A man and woman kiss passionately and it's implied that they are having sex, while they roll in the bed, on top of each other. This last for about ten seconds. Afterwards, it's shows them in the morning, in the bed together.

we see full rear nudity for several seconds (possibly even a minute) while a woman lies naked on a bed, the man she is with also puts his face on her butt

we see rear nudity of a strong black man running around in a mental hospital, he's wearing a light blue hospital garment. He's trying to get open a door, so this is seen for several seconds.

Lenny shoulders into Daryl. Charlie slaps Daryl.

a car crash

"f" word is used throughout, as well as other language

There is cigarette smoking in nearly every scene - mostly by the main character.

at least two scenes of drug usage, drug related dialogue is used throughout the movie. some smoking

We hear someone died of a drug overdose.

Someone dies in a car crash.