@cstross did you ever see that "The Universe" episode about the 2Suit, the space suit designed for sex in zero g?

https://en.m.wikipedia.org/wiki/2suit

"The documentary described the 2Suit as "one small step for humankind colonizing the universe." The garment was presented as a utilitarian garment with multiple applications that serves the need for human intimacy and procreation by stabilizing physical proximity in microgravity environments."