You can find that most sex sites allow free sex chat or suggest sex contacts for you to message.
In fact, Company/product listings on this page DO NOT imply endorsement by the site operator.
This is very different approach from general dating sites.
Although some of these sites cater for a wide range of sexual preferences, the ones that seem to be the most popular cater for very specific sexual preferences.
As such, just about every sexual niche you could imagine is catered for by an internet dating site nowadays.
Most adult dating sites offer many special features to cater to the needs of their users.