A character watches porn, nothing is shown to viewer.
Characters are seen showering, No nudity is shown
Photos/adverts are seen with women in lingerie.
Episode 2: character is shown watching porn but the screen is blurred and his head is covering it.
Episode 3: Man is shown asleep (shown for 2 seconds) with his hand under the waistband of his underwear while porn plays on the TV ( not shown)
Starting from the first episode porn is shown I wouldn't suggest it porn is shown throughout the episodes.
A man is shown making a paper cutout of a woman in lingerie. The camera then pans to show that his whole room is covered in paper cutouts of scantily clad women.