OK, to be honest, there’s quite a few things the nuns would not approve of, however, I am referring to one thing in particular at the moment.
When I was young, I wanted to be a nun. I think the part that interested me was that dressed in a habit, I could look like a bride every day! (Clearly, the concepts of chastity and poverty hadn’t entered my mind yet.) I was also intrigued by paranormal and psychic things – things the nuns didn’t particularly embrace – actually frowned upon quite a lot.