Kaja And id she wants be pure (and wants to wear one) - he just need help during hard times (sleeping, sleepower, go out with bf/gf).
I think you are wrong, if she wants to be pure she has to wear the belt at almost all times, or the "soft" moments will become "hard".
It is one thing to want to be and another to be able, the belt is there so that we cannot even consider the option. It is easier for us girls to be good when the bad option is not really eligible.
sports : they avoid bad choice, but only while we are playing it. My cousines do not have sports break, they play them with their sport belts. My aunt and cousines do not have absolutely any break if they are out of the sight.
swimming at public pools: same, you can use a cable belt that can be changed for another safer when she arrives home.
cycling : same, my aunt and cousines do it with their belts.
school trips: you can do it with your belt.
camps: the chastity belt here must be a must. I camped a lot of times with my belt.
Kaja And if he occasionally fails? Nobody is perfect.
purity has to be perfect or it is not, it is not a dish that gets stained, scrubbed and remains as the first time. If purity is sullied, it disappears, because it will never be purity again and you will never give it to your love, who is who it belongs to.