A explicit sexual relationship between the main character and his wife. The characters are intimate and are seen kissing passionately. No nudity is shown.
A man and women meet at a party/bar, they have a small conversation and then are seen kissing while moving towards a room. Sex is implied, nothing shown. The scene ends with next morning where we can see the man still sleeping on his bed without his shirt. Male topless nudity is shown.
The main character and his wife get intimate in a hotel room. The women is seen wearing a kind of see-through lingerie while the man takes off his shirt. They kiss. No nudity is shown and this scene barely lasts a few seconds.
A women is taking a shower, Only her bare back is shown and her side boob is visible in one scene.
There is no nudity in the first 3 series other than sex scenes - just a couple of foreplay / lead up scenes which aren't graphic at all.
A few brief-ish sex scenes as well as lots of characters in lingeries and bras
Some men are seen at a spa wearing towels around their waists. Women are seen in bikinis. A man is seen leading a woman into a private room at a 'spa', implying they were going to have relations. We can hear moaning sounds but no nudity shown.