I tried asking this question first at the source but it got deleted. Then tried a different subreddit and it got deleted but said to try post here.

So one day I’m scrolling my feed and I get a lot of recommendations on dating stories and a subreddit for Feeld popped up. I don’t have any particular interest in kink life styles but I did notice a lot of users of the dating app seem annoyed by the amount of couples looking for threesomes when it involves finding another female. Now I haven’t been in the dating pool for over 10 years but it seems kind of odd that a kink friendly dating app would have so many users that hate this idea. So my questions are as follows

Why would a straight couple looking for a female for a threesome be such a big deal? All I could think is maybe because it seems predatory or it comes off as a guy just trying to fulfill a fantasy. Is this it or something more?

Would it be better if you had a straight guy and 2 bi females? Again as a couple in a relationship but bring in another bi girl that way everyone enjoys each other equally? ( or 2 bi guys and a straight or bi female). Would this be less frowned upon.

I noticed it appears to be more approved for it to be 2 men and a woman. Why is that?

I’m sure there is a lot more that goes into the dynamics of the situation per person. I’m not looking to actually try anything like this personally but more curious on how everyone looks at these situations.