The "of course you are playing the whore route" was a joke, though i suspect it indeed is the most popular choice, obviously not to everyone's taste.Obviously if you're playing all the Filthy options you're going to have a greater chance of Sophia being horny. I wasn't denying that. Only your assertion that we're all playing the same route(s) as you, for the same reasons.
Alternate dialogue actually does happen in the game. Digging through the code of the Yoga event you can see that Sophia's inner dialogue changes based on how many times Sophia flashes her tits.
Also happens in the Prison event, with dialogue changes based on how recently Sophia slept with Liam. Since it's possible for her to sleep with Liam the night before, she's not feeling as constantly horny and unfulfilled as a purely Filthy route run.
There's also extra dialogue on the Ellie route of her commenting on how nice and quiet it is with Dylan off at boarding school. And, as I've been reminded recently, her now having the opportunity to do some nude sunbathing with Dylan away.
Why L&P seems to neglect this for some routes and not others is curious though.
You can make her horny for a few particular characters, for women only or for EVERYTHING.
If you do play a everything route, her lack of self awareness is shocking...
And i'm waiting for her mind to catchup, she keeps enjoying it, she's horny 24/7 now, yet she's still surprised that she got turned on by it.
We can only have "wow this was actually pretty exciting" so many times....