"Will they be told what sexual promiscuity means?"
When I was vaccinated, nobody told me I could get Hep B from sharing needles and unprotected sex and those are, in fact, the most common ways to get it the US; but as a kid I knew not to do those things for reasons unrelated to being vaccinated.
Then what will you tell them it's for? There is no other reason to have this worthless vaccine other than to protect against 2 strains of a common STD which has a hundred more.