So, not totally dependent on smutty talk down the pub for info then?
Now, I'd like to talk you through something, one hostel veteran to another. What is suitable for 16-25 year olds (bearing in mind the age of consent for men and women, in same-sex and opposite-sex relationships is 16) is not the same as what is suitable for secondary age pupils.
This is especially the case as residents of a hostel can walk out of a talk, and attendance in the first place is voluntary. I can think of fellow residents who were abuse survivors who would not have gone near such a workshop for anything less than being promised an immediate council flat tenancy, and perhaps not even then. Their choice.
School children don't get to choose whether to attend RSE classes and they don't get to walk out if they find it triggering and they are at a different life stage.