Kaja Are you addicted on self pleasure and you want to stop?
Addicted would be too harsh to say.
Kaja Do you want only to prevent self pleasure at all?
That's what the belt is for.
Kaja Do you want to stay virgin (and you can not do it without cb)?
This can also be possible without a belt, but one careless action and something might happen.
Kaja It is for you more symbol of a "good girl" than exact reason?
Maybe you should define more precisely what you mean by reasons and symbols.
Joh Why do you think it is ok you do not self pleasure yourself?
Saved energy for others, it is also something you should have together with your partner.