I am teaching the sex education (puberty, reproduction, STDs) starting next week, and although I am competent with the subject knowledge, I'm not sure what sort of tone to set when teaching. Could you help me please? WHat do your Sex Education lessons feel like? What sort of atmosphere is ideal? What do you say at the start? What expectations/groundrules do you set? What do you do if someone can't behave appropriately? What do you do if someone starts asking personal questions? What do you do is someone starts relating very personal information? Have you got any interesting anecdotes that work well in class? Any suggestions, comments, ideas, stories would be helpful.