Hmmmm, I lived in a convent for a while (yes, it's true)
and I would have thought a nun 3 times a day might be quite fun. The older ones are nice people, but the younger one's can be rather cute :)
My older nun friend who lived in the unit next door to mine used to guard her younger nun visitors very well when I was around.
I asked her if she didn't trust me with them - she said it was obvious that I couldn't be trusted, she said that's why god arranged it for me to live next to her - to be watched. She well knew her habits were clean, but she was pretty sure mine were grubby - but that wasn't the real problem - she didn't trust those young nuns either :)