That definitely seems like a useful place to poke at! Leareth appreciates Thellim asking the question, and smiles at her to convey it.
"Hmm. ...I do think I maybe have a difficulty where - I know some of the patterns of how a romantic relationship between a man and a woman are expected to go in Velgarth - in several different Velgarth cultures - but I am...mostly not drawn to that as a guide to follow, and I am not sure Ramona would appreciate it if I were. To the extent I have any previous experience with romance, it was - in a context where I do not really approve of the ways that men and women were expected to treat each other, and I would almost rather start fresh than take what I learned there into my relationship with Ramona."
(The last time he was regularly involved in romantic relationships, and took notes on it for his records, was in the Imperial court of the Eastern Empire. He doesn't remember that, per se, but has the sense he was "good at" courtship, in the sense of having invested in a skill, and also didn't particularly enjoy having to exercise that skill and was relieved when he could stop. He's not sure if it would be useful to explain the Eastern Empire to Thellim - or Ramona - but it doesn't sound fun.)
A slight shrug. "I have the sense that, maybe going along with being more advanced in other ways, Ramona's world has - a wider range of expectations for how relationships ought to look and what it means to be a good partner to someone, including ways that would suit us better as people - but I am not from Ramona's world, and I think she would rather not be instructing me on all the relationship-lore her world has developed."