Amira It is your free decision what you are doing during this time. If you feel to masturbate, do it. If you have not the feeling for, don't.
Amira I have a hard time to accept, that when I am out of the belt it is complicated to think of anything else but touching myself. I feel like being a servant of my body functions
It is normal and most have this problem during their life. You have to learn to control yourself. When I'm at work, for example, I can't just give in to the urge. I postpone that until later. With you it's more complicated, because you can't decide freely when you feel like it. You have a schedule and it has to fit in. That means your body demands it when it is possible. Accept it as it is or change your possibility to get out of the belt.