[Misc] I'm going to do a 10 minute (informal) speech in class about skincare. If you were in the audience, what would you like to hear about?

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I'm not sure if this type of board is accepted but in any case... I'm seeking help. There are so many things I want to talk about in this speech but the time limit is a big restraint.I've limited the topic to general information and the common misconceptions regarding skincare - basic stuff, really. And even though I've limited it to that, there's still a plethora of information that I would've liked to share with the class but can't.I already have a general idea/flow about the various topics I want to touch on (pH balance, types of acne, harmful stuff: astringents- excessive physical exfoliation- baking soda- citrus fruits- the like, etc.), but I would also like your input. :) In short, what would you like to hear/know more about?
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Submitted by yumeira