Erm, that's a tough one really. I don't know, it depends on mood. I have never been aroused by appearance, but more by situation. Often, this involves me being put in a situation rather than seeing a situation from the outside. I am easy to arouse yet not at the same time. I have always been paradoxical like that.

I guess two people in love cuddling. Probably not the answer you were looking for but the spiritual connotations incumbent in such an act make it powerful and sexy.