Reach over and squeeze his knee (while you're both sitting).
Grasp his hands and coax them into a prayer position, then position your hands over his.Arranging your hands as if you're praying projects power and control (it's a gesture executives and politicians use all the time while speaking).
Put your hand on the top of his inner thigh.This move isn't effective just because it is super close to his package (though that doesn't hurt).
Lightly scratch his neck along the hairline.
Place your hand on top of his shoulder, keeping your elbow straight.
Gently place your hands on his cheeks.