Holy shit Transformer is epic.
XD
Pol is a shit board for furry incels.
Cuck
Cuckold on
This isn't a subreddit for Cuckolds
Cuckold is a shit board for kinksters incels.
Cuckolddom
These aren't related sites, but
cuckservices.com has some cucks.
Cuckuckery
This is not a fetish subreddit that is specifically for Cuckolds, but if you're in the mood for something a bit more hardcore, cuckoldery has some cuck-specific stuff, such as fetish porn for Cuckolds.
Cuckolddom1
These are sites dedicated to Cuckolds.
Cuckolooses
I think this is a subreddit for cucks.
CuckoPorn
This has nothing to do with Cuckservices. There are a bunch of other websites dedicated to fetish porn, porn for Cuckolds, and so on. But they should at least be considered for each other, as they can both be very distinct in terms of culture and interest.
CurvyCurvaceousCocks
I think this is a fetish subreddit dedicated to girls with big natural boobs, and is a good place to try it out if you're looking for something to try.