sex game; sexual play
Refers to playful or recreational sexual activity, often with a connotation of roleplay or structured scenarios. Can be used in both casual and more formal discussions of sexuality.
They enjoyed a sex game in the bedroom.
Sex games are popular among couples.
Compound of 性 (sei, 'sex') and 遊戯 (yūgi, 'play, game'). The term is a straightforward combination of these elements, with no known historical complexities.