Originally Posted by Zenith
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First, this seriously reinforces negative stereotypes about male sexuality, especially gay male sexuality. That is, of the few male options where you could have canon gay relationships (Gale is obviously bi, constantly rambling about Mystra, and Wyll eyes Karlach), the single remaining option for a full gay male character is a detached, theoretically promiscuous guy with commitment issues.
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I think all companions are bi/pan and not player sexual. And Halsin had both male and female lovers ("elf maidens").


Originally Posted by Zenith
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Second, it's outright nonsensical for a druid. Druids revere nature. Nature overwhelmingly represents bonding as longlasting pair bonds, because the alternatives are usually predatory low investment male mating where the mating happens and then the male moves on to another female and leaves the burden of raising offspring to the female exclusively. The exceptions here are lifelong pair bonds where there is equal parental investment.

So Halsin suddenly favoring a non-commital fling mentality which is rarely reflected in nature, especially in the emotional sense, feels completely at odds with the concept of natural order.
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Well he explains it with following the way as bears do, seeing that bear is his favourite wildshape and he is build like a bear, having much with his favourite animal in common. And wood elves are known to be poly too. I wanted him to be monogamous too but I can understand that they went with him being poly. Him being poly isn't the main issue - sure disappointing for those who hoped for monogamous Halsin, but the romance could still be written in a good way showing they have a loving, serious relationship with both Halsin and Tav/Player feeling content.

If you are also in a romance with Astarion, then Astarion will say "I am sure it would be quite a harmless affair" regarding Tav being with Halsin too. So at least Astarion (not sure about Shadowheart) doesn't see Halsin as a serious romance for Tav but instead just for the sex. I don't think Tav can even really express what the "romance" with Halsin is - only to the other partner (by breaking up or saying e.g. to Astarion that what they have together is unique) but not really to Halsin. Maybe Tav only wants him for the sex - maybe Tav really is in love with Halsin. And Halsin will react the same to both situations. So Halsin being inconsistent in his romance is like being written for both parts (only sex or real love) but merged together (or wrong dialog for the current situation played). I don't think it is just a bug with wrong dialog flags, just that he was meant to be written for both paths and then they ran into time restraints and just thought - ok better than nothing.