Sexual hospitality

...This is because it is believed that an unbreakable bond of solidarity can be created between host and guest only through the act of "eating and drinking together," that is, ingesting the same substance into the body. The custom of "sexual hospitality," which is said to have been practiced in some societies, such as pre-Islamic Arab societies, in which the women of the household sleep with the guest, also likely had a ritual meaning in that the guest ingested the guest's bodily fluids through sexual intercourse. The significance of this type of hospitality is completely different depending on whether the guest was a member of the same community as the host or not.

*Some terminology explanations that mention "sexual hospitality" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…というのも，同一物質を体内に摂取するという〈共飲共食〉の行為をとおして初めて，主人と客人の間に断ちがたい連帯のきずなが生まれると考えられるからである。イスラム化以前のアラブ社会など，一部の社会で行われたといわれる，家の女性を客人に添い寝させる〈性的歓待sexual hospitality〉の風習も，性行為を通じて客人の体液を摂取するというところに儀礼的意味があったのだろうと思われる。　このようなもてなしは，客が主人と同じ共同体の成員であるか否かによって，その意義をまったく異にする。…

※「sexual hospitality」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報