Just a quick explanation about Housemates, they aren't exactly "forced" to have sex with anyone.  There are reasons (violent episodes in the last 30 days, poor personal hygiene, they have an STD, etc.) for which they can reject a person without penalty, and can reject anyone with a penalty (partial loss of a share of the commune's profit usually).  They are only contracted to do it every so often (once a week, once every two weeks, etc.) as well, so they aren't just free-for-all prostitutes, there to fullfil everyone's sexual whims.  Also, they examined and approved every colony member before accepting the job, and have to approve any new member before they get added to their contract, and usually the colony.  They tend to be the kind of person that would have many lovers for short periods of time each, and merely add that to their resume to get an advantage when other communes are looking for a new person.  To them it's no different than a biologist being willing to deal with human waste to get an advantage over the other biologists.

I added it so that I could create an NPC Housemate/Botanist to the commune so that we could have someone there to interact with all of the time.