Because it's comforting. Because it's safe. Because it feels good.

But I feel like if I bring it up then she might rethink it and stop doing it. I think she is very cautious with me regarding touch (which is why she is sticking to the danger free foot zone) because of the way I reacted last time when she sat next to me and put her hands on my head. I was stiff and was mostly holding my breath. And a few weeks later when I was mad at her I sent a mean e-mail saying I wished I had never let her touch me because I don't let anyone touch me and she was a liar. She didn't touch me for weeks after that.