Are you guys kidding, if there is something ruining your session, speak up. Tell you masseuse to correct it. they usually do.
Cell phone, if they leave it out, point at it and shake you head NO. they understand.
Music to load, point and shake your head NO.
Noise next door, point and shake your head NO.
I am a solid strike three type of guy and I absolutely call the strikes if they occur. Interrupting a session for any reason at all is a strike. The third strike and I am either out or she is on her knees giving me some serious up and down apologies.
At that point in the session, there is nothing that can fade me.