You are understanding my statement correctly that number 3 is the highest risk of your scenarios, but all of them are really low risk in my opinion.
By the time a person has had five sex partners in their lifetimes, they likely have at least one type of HPV so if you know something about their sexual history, you can judge whether it would be good to tell people or not.
You have an indefinite time to ask your last question.
Terri