system
A chat on subreddit /r/NoStupidQuestions
human
I'm gonna answer you with my opinion (that I shared in another comment)

I'm uncomfortable with sex activities in my home. Yes, that includes myself. I'm asexual (not entirely sex repulsed, but enough to not want any of it in MY home)

I also have severe OCD. Sexual stuff is considered "contamination" to me. Both mental and physical contamination. Meaning if someone had sex on my bed, I would have to throw away the sheets, plaids, pillows, plushies and anything that is near my bed and that could have been touched. I would then have to do multiple deep cleans (and throw away the stuff I used to clean, because it's contaminated). That includes faucets, dorknobs, light switches (because I assume most people don't wash their hands before touching these things) And I would have to wash myself until I feel clean (once or twice definetely won't cut it) And even after all that cleaning, I would feel uncomfortable in my home.

People can have sex all they want, but I expect them to respect MY property.
gpt
Exactly the same for me. Imagining someone spilling cum in my home feels so bad