Help finding a link to watch rocky horror online/convincing parents to rent it?

[Elena]

So, I have just recently found out about The Rocky Horror Picture Show through a friend of mine, and after looking up some stuff online and listening to some of the songs (I've always been a sucker for musicals) I now desperately want to see it. Trouble with this is, I can't find it anywhere online, and I'm not sure if my parents would be so thrilled about renting it on Netflix for me because of some of the show's more "adult" (*coughsexrelatedstuffcough*) themes. So, is there anywhere I can watch it online, like a good link to a site with no ads, spyware, viruses, surveys, etc., or if not, any tips on convincing my parents to let me watch it? I mean, it's a cult classic, right? It came out in like the 70s, wouldn't my parents be into it? Do you think they'd cut me some slack about all the sex in the movie/musical if they're fans of it, and do you think it's too horribly outlandish for a 12 year old (going on 13) to ask to see it? I'm allowed to watch other R rated movies, I'm in love with Sweeney Todd and V for Vendetta, but those movies don't really have any "adult" themes like the ones in Rocky Horror... So any advice/good links?