Some characters sometimes go to brothels or call in prostitutes. Nothing explicit is shown or said, and it's always regarded as something only shameless and degenerate people do. Some kissing is shown, and at one point a man begins to remove a woman's outer clothes as well as his own.
The female proprietor of the wine shop sometimes flirts with a certain married man she has her eye on, but he always rebuffs her. She eventually gives it up.
A certain father-daughter con duo are in the business of selling sexual-related items, from condoms and fertility boosters to porn paintings.
One moment when a group of men tries to force a group of women to strip, and another when a man tries to rape a woman. Neither attempt goes through and there isn't much physical contact.
A woman offers herself up as a concubine to a man and removes her outer clothing. The man pushes her to the ground and removes some of his own garments. Not much is seen after that.
Later in the show it becomes a plot point that a certain couple hasn't consummated their marriage.
A young man is shown shirtless a few times, mostly in the context of treating wounds.
In a comedic scene, a girl pushes a young man against a wall and forcibly kisses him.