Sorry for all the questions. I just found it fascinating.
But I could relate it, as it was a "chic" thing to do in my parts too back in the day (until around the 1970s), for upper class folks (using the polite forms of address, and so on).
A good analogy in English terms might be the flirting with all the speaking formalities in period movies live "Room with a view" or "Pride and Prejudice".
On the other hand you can't dirty talk with a straight face in Persian, since nobody has ever heard or read about it, it sounds super funny.
I recall the One-Thousand-and-One Nights being quite bawdy (talking about lusting after well-endowed servants, IIRC); maybe that's not authentic Persian literature though?
Maybe I misunderstood "nobody has ever read or heard about it"?
Can you help me better understand your comment, thanks.
New Persian literature starts around Rudaki (9th century). Since Islam made sex and showing affection taboo, the tiny fraction of explicit erotica are not studied/known by the general public. Because of the taboo, majority of Persians have not ever heard their parents speak affectionately. And when we study affectionate literature in school the teachers tell us it's about the love for God, and the exams will question us about such love.