Season 1 episode 2: woman is seen in the shower, side profile is seen through glass door but no nudity is completely visible.
3 sex scenes. All of which show a woman in her bra and the man is shirtless. The first 2 scenes show some thrusting motions. They are less then a minute each. The third is longer, but it is awkward for the two people and they spend most of the time fumbling with each other's clothes.
We see a person masturbating to pictures of his wife. The pictures are not sexual in nature. Nothing explicit is shown, just the hand holding the phone and the jerking motion.
In Season 1: Episode 4, there is a flash of a pornographic video displayed on a screen behind Miles. It is accompanied by lots of unrealistic loud female orgasm noises
There is a sex scene in which the woman requests a violent sex act (slapping) there is some thrusting shown and a lot of skin but the woman is wearing a bra.
There is a scene where a man clicks on pornography on his laptop, an age restriction warning home page is shown with a background image of a piece of a woman's torso with underwear on. The man then goes downstairs and decides to watch the pornography on the huge tv in the sitting room, again we see the age restriction warning homepage. We hear a couple thrusting and we see the TV (couple kissing) through the mirror.