The moment the hour, couple of hours or overnight stars they need to know they have to put the phone away and silent.
During an overnight they can always take a break to go to the bathroom and why not check their phone there.
Did you pay him for 55 minutes or 60?
Did you cum?
I wouldn’t compare an exam to a date with an escort but I get your reference. I guess the guy was certainly a clock watcher to know the difference between 55 and 60 minutes.