1x01 ("The Inn at Whitewell"): A man asks another man why people would videotape themselves having sex. No nudity.
1x02 ("Lenclume"): A woman leaves a man's room in the morning; it is implied they've had sex, but nothing is shown. A man asks another man if he "cemented Anglo-Polish relations," implying the action of spending the night with a woman. A man jokes to his wife that he's not wearing pajama bottoms (nothing is shown) and asks if she's interested in phone sex (nothing is actually said).