One of the reasons I don't touch my students a lot is because I believe they need withdrawl of the senses to align with the 8 limbs of Yoga and find their way to Samadhi. Touching is a sense that can bring people out of their inward and insightful looking. It takes them outside of themselves. But I do see what you're saying. I just prefer hugs before or after class. :)
RE: Dear Yoga Teachers