HHelen More opportunities for sex there.
I can't tell you're wrong,sex is more common during university,and similar...
But it would dependson her too,and if I remember well,she wants to wait until marriage.So she would les sprobably start to be flirting(and more)with anyone.
HHelen She is older than your and didn't wear the belt to school.
You should try a belt-free duration,to be able to compare her grades with/without the belt,so.