I didn't vote to close the question -- I downvoted it for what seemed to me a lack of research effort and of clarity. That's what a downvote on a question is supposed to mean, I'm not sure what your complaint is.
I then commented to reference existing topics on the site, in case in case you'd like to read further.
And I gather that the topic you're asking about may be considered "esoteric' -- asking a question like, "So how is tantra not a sex cult?" is kind of tactless IMO.
Then, in a comment, you asked me whether I know what the word "sex" means? I'm not especially offended, but I don't see how to answer in a way that would be helpful etc.