On the world of Thirdrock, the humans there practise group marriage: one to three women marry one to three men, with a maximum of four people in the marriage (or occasionally five under rare and temporary circumstances), and at a minimum one male and one female. The men are not married to each other, and neither are the women married to each other, each is married to all the members of the opposite sex.
The people of Thirdrock are extremely homophobic for the most part. Homosexuality is illegal, as is failing to report it if it is observed. Therefore, no-one wants to admit that it occurs, or be seen to condone it in any way... and that includes designing bedroom furniture.
On Earth, where most marriages/partnerships are between two people, we have double beds. However, I was wondering about beds for people on Thirdrock... how might they be designed to cater for the variable numbers of males and females in the marriage, up to five people total, and with at minimum one male and one female?
Any design that would appear to discourage nocturnal homosexual activity would be preferred if it is at all possible.
The people of Thirdrock have an approximately mid-1940's tech level, and in some ways, a rather Victorian-era morality.
Group sex is permitted and encouraged but is ultimately optional.