I am over on Fetlife and have been for several years. My screen name over there was different (I have subsequently aligned them to be the same on both sites). When I first signed on, I wasn't very active and mostly lurked. When I started posting pictures over there, the floodgates opened.
I find the discussion threads are much easier to navigate here on Zity than over on FL and there is broader application of moderation here, as well. Though discussions here can become "heated" (I'm guilty of that, too), they do tend to stay civil.
Interestingly, I've met more people IRL through FL than here on Zity (and the ones I have met that are on Zity are on FL, as well). I'd say that the people I spend the most time with on FL are more "out there" on FL than they are when they are on Zity. Some are downright "Scary." And the ones that I have met IRL that are only on FL are definitely more "out there."
I've had far more intimate and discussions with a few people who are on FL. I also get a larger number of inquiries over on FL than here related to my enema fetish. Most are respectful honest Q&A. There are a few that aren't and I mostly ignore them. I do try to keep it civil on both sites.
FL allows couples accounts (secondary accounts, though there is the encouragement that they have individual accounts). There are some de facto couples accounts here on Zity where one member of the couple writes for both members even though that (technically) isn't allowed.
One thing that happens more frequently on FL than here on Zity are the more direct and overt "offers." By that I mean some version of the offer to meet IRL and, perhaps, play together. Most are not serious; just lustful, wishful thinking. But a few seem more serious (and maybe more elaborate wishful thinking).
Oh, and the ones that are perhaps the most interesting are the ones where I have been contacted by the male partner of a couple. The initial contact may be innocuous enough like "we like your pictures" or "we like your writings." And further conversations may be cordial and may branch out somewhere else and never get beyond those casual written conversations. But some number of them will turn to the possibility of playing together. As a cautionary tale, I've learned that if some guy approaches me about his wife being turned on by some picture or pictures of my cock while taking an enema and then finally getting to "how would you like to fuck/be fucked by my wife while she's giving you an enema" and I have no way to confirm any of that...it's time to walk straight away no matter how enticing it might seem.
As a result of that experience, I do not get into any discussion with any "couple" about playing together unless I have access to both of them and independently of the other. I want to make sure that some guy isn't pimping his wife/girlfriend and she doesn't know about it.