Bare-breasted women are on show almost from the start of episode one.
Frank Finlay's naked backside appears a couple of times.
Although the series is about the famous womanizer, and there is much discussion of his libido and sexual encounters, the closest it has to an explicit sex scene is briefly in episode four, where a man is shown thrusting on top of a woman (from a distance). There are however several repeated shots throughout the series of women's faces, shown in close-up and apparently in orgasm.