In any case it does bring up an opportunity to point out and discuss the Anglo European sort of Puritan views on sex and it's depiction in media that are predominant in places like the US and Canada. Culturally, in general, we're fine with ubiquitous and/or brutal violence but showing sex is somehow taboo or reserved for "adults" across all media, not just cRPGs. In Europe though, at least the last time I was there in the early 00's most countries have actual porn on network TV after 10/11pm (not sure if this has changed).
Getting a bit off-topic, but I suppose some of this topic is stemming from the question: "what age-range should BG3 be made for?" Teens+? Only adults? Okay for Teens, but Parental Guidance advised?
Given BG3's cartoony violence, the fact that D&D Starter Set is rated 12+, BG1&2 were originally rated "Teen," and [probably more reasons] there's a decent argument that BG3 should be rated Teen. Or at the very least, on the less-explicit side of Mature.
And while the US and (I can't speak for) Canada have more Puritan views on sex, it still seems (from my admittedly lacking knowledge) that showing sex is generally still an "Adult Only" thing around the world. According to you, in Europe, actual porn is only on network TV after 10/11pm = after kids go to bed. Also, don't many (if not most) countries restrict porn watching to only those age 18+? Doesn't that make it broader than just the US and Canada who limit viewing sex to Adults Only?
Of course, there are big caveats on the above: - "limited sex scenes don't necessarily constitute Porn" (which circles back to the Question: "What is the purpose of sex scenes in BG3?") - "violence and other extreme themes are also limited by similar 'Adults Only/Mature' restrictions; it's the Puritan US who thinks that nudity/sex should be a step higher."
