Not everyone has the sexual capacity to embrace kink, and not all forms of safe, sane, consensual kink are embraceable by those who do. Some like to be dominating. Some like to be submissive. Some like to be spanked. Some like to spank. Some like to restrain. Some like to be restrained. Some like to worship feet. Some like to be urinated on. Some like to do housework naked.
If it’s conceivable, there’s someone out there who likes it and probably more than a few websites devoted to it. The problem is that an unshared kink becomes a burden. You want or rather need to treat someone or be treated by someone in a very specific way, but finding that person seems next to impossible.
