This tidbit was rather more avant garde than porn. And as has been said before, the Rules are not about me. If it's there, it does not matter what I think. It was there. Rule 3 obeyed.
Themes are pretty darn important in MOTWs.
A lot of effort has gone into embedding them in the very best such episodes we've seen. Mr. Amann spent a lot of time on age, or more specifically, age difference. It was intended to permeate. It was meaningful in the conclusion. But here we see an example of the reality of MOTW themes.