I am a teenager who has OCD, and I suspect I also have Sexual Sadism Disorder. I truly love my sister, I really do, but I feel like I have some kind of “desire” to touch her. This has made me really worried. Could it simple be curiosity of the opposite gender. I thought it was an intrusive thought, but I feel like I might ACTUALLY have some desire to do it. I really DON’T want to, so I don’t know where this feeling is coming from!