I absolutely want to know them in case of any problems that crop up. Let’s say that a female guest started her period in the middle of the night. She can contact me (because she’s met me and knows that I am a reasonable human being) to say ‘Oh dear, the sheets are stained. Can you help?’
That helps me because I can launder the sheets straight away avoiding stains and helps her avoid embarrassment. An extreme example, I know! But the more comfortable a guest feels with the host, the better the stay should any problems arise.
As a guest, let’s imagine that the toilet gets stopped up. Would I rather report this to someone I’ve met or a stranger?