Attending a gay sex lesson from a sex professional

She had doubts about how to do well in sex with her partner and she went to a specialist to learn how to do it in the best way. so far we could say that everything is half normal. what is already out of the norm is that the sexologist brings a boy to the consultation and fucks him in front of you so that you can learn. but hey, witnessing that fucking sure didn't bother him at all.