Joke aside, of course this little joke in the game was never about shaming the pineapple pizza lovers, but more about give some fluff to the game with a tender moment between the mother and daughter.
Though I never knew it was a trope in VNs, I knew it was just a common pop culture joke as it often appear in series or movies.
For the other porn tropes of the delivery of the sausage pizza or public exposure to the delivery boy, were in the corner of my mind, after all they are trope for a reason, because it's fun, so they might appear in the future if I find a good moment to put them.