When your nipples are good and hard, place a clothespin on each of them. Oooh, that hurts, doesn't it. Well, you had better get used to it - those pins stay on for the remainder of the lesson, and there's a long way to go!
Push your skirt down to your ankles. No touching yourself - yet!
Twist each clothespin 45 degrees 20 times, alternating clockwise and anti-clockwise.
Now stretch your arms out hight up behind your back and stay in position for one minute. That's got you nice and close to he screen hasn't it?