Why is The Rocky Horror Show so popular?

I heard so much about this movie , and finally decided to watch it. I know it has a very loyal and fierce fanbase, which is cool, so I don't wanna make anyone mad. But I had mixed feelings about it.. although the music was great. Anyways , I was wondering why its so popular ? Its very bizarre and disturbing , and I'm not sure what about it made people love it . Im just genuinely curious , and would appreciate some honest aswers. No mean answers? Lol , well thank you !