Drawing naked men

I went to a life drawing class in town yesterday. I keep wanting to go but it's on a Friday morning, at which time I'd usually be at college. I found out it's still on in the holidays though, so I dragged myself out of bed and went. I enjoyed it loads, as I've found I do with life drawing. I think it's because you're allowed to stare at the person while drawing them, and doing that in a cafe makes you look weird :/
  The drawings took varying lengths of time from 1 minute to 20, and I used various media (chalk and charcoal, pen, ink and graphite).