Are there any Christian sects that believe in "curative intercourse"?

A lot of episodes from the Law and Order franchise seem to draw inspiration from real life events, however, with a recent episode (*Law & Order: SVU Season 18 Episode 19: Conversion *), I'm wondering whether the writers "jumped the shark": they portrayed a weird "Christian" sect that actually believe in something they call "curative intercourse" - in the words of the character Rollins, they believe "you can rape the gay out of someone". It seems a little far-fetched to me that this would actually be taught by any group that claims to be Christian, but with groups like Westboro , I suppose anything is possible - is there any group that identifies as Christian that actually teaches any doctrine that resembles this?