Laura What was your mom's rationale?
Rationale is simple. In terms of virginity - my mother doesn't really want me to get pregnant before graduation (so I will wear the belt for at least 2 more years) or waste time and energy on closer relationships with boys. Of course, there is such a thing as contraception, but my mother has very limited confidence in it for personal reasons - her sister got pregnant despite using it. As for masturbation. Mom believes that masturbation is an immature, incomplete form of gratification. That's why it was forbidden for my father in the first place, and - since I choose to wear the belt - it is also forbidden for me, at least officially.
Laura I suspect they consider her chastity belt as another BDSM item
For them, the belt is just a BDSM toy, but it may have additional uses depending on the context. For me too.