It's not necessarily a "phobia". Since the massage is really what I am going for but anything else I get is gravy (to me). If I know before hand everything that is going to happen then that spoils the eroticism for me. My last massage, the guy didn't specify and I didn't know if he would even get nude, but when I rolled over, he was nude, he then started an HE after a bit, and then even more happened. That was much more exciting for me than knowing "I'm going to do A, B, C" before hand.
Everyone has their likes and dislikes...I wouldn't go so far as calling someone else's way of approaching eroticism a "phobia".