What do guys really want to know about girls?

I decided today to dabble in making a youtube channel. What I want to talk about for my first "vlog" entry or whatever I decided to make it for guys like the ones I see in the relationship section of Y!A that are confused. I just want to put together say 10 questions (maybe fewer) that most guys have and answer them in a way that makes the vid feel like their just getting advice from a friend that happens to be a girl =)