Not to sound childish but I didn't even like for my parents to be in my room when I was a kid.So I definitely don't plan on leaving anyone in my house while I'm away outside of a relative and some of them I wouldn't leave in my house alone.As for sex people sleep with people they don't trust everyday just on the basis of trying to catch a moment of bliss
,so that doesn't mean anything but you are trying to get some. So lets just say discretion is advise when deciding on who to/or not to leave in your house. Or just don't leave anyone there at all unless they chip in on rent or the house note