Perhaps I am suggested by the data that was presented throughout the game.
In week 1, Dalilha's friend during the morning gives the option of sticking a finger in, but not much more than that happens.
In week 2, our beloved girl with glasses discovers our porn package and suggests if MC likes to put things in his ass. And we already know the story with Lyssa where he mentions that he did not mind that she had a penis, he even said that he was part of her (that is, he loves that part of her, she is not a girl without a penis).
We also find a table with a list of fetishes in which "anal play" and "pegging" appear, so with all this we can expect a more playful MC, even if it is something merely optional, I would really enjoy it than just getting stuck in the traditional.
After all, the game is Fetish Locator ... how far are you willing to play to win?