I was at one point a 14 year old girl taking a Scientology Communications course, brought there by my father to train me in his religion. While I certainly can't speak for all of the children in all Scientology classes, most of the other children there that I hung out with were also brought there by their parents to be trained in Scientology.

It seems plausible to me that if there happened to be a 12 year old girl in lukeprog's class, they would have paired them together for that part of the class specifically because it would create an uncomfortable, "creepy" situation. Developing the ability to react unflinchingly to that sort of situation is pretty much the point of the exercise. (As an example, they paired me with a grandmotherly older woman for a different exercise: bullbaiting. She was certainly not the sort of person who I was comfortable trying to provoke a reaction from or had an easy time remaining stoic to.)

But it seems unlikely to me that the people at the Org I went to, at least, would have gone to the extent of enlisting their daughters in the class specifically to make one man feel uncomfortable, as you seem to be proposing.