When I was a lot younger, maybe 6th grade, I believe. I use to visualize myself having sex with anyone I looked at. No matter what gender or however older that were than me. People at school or on the bus. Maybe in the store or mall. Even my teachers and I wouldn’t want to stay after class or anything to be alone with them. Absolutely everywhere. I hated it. Just thought I’d share.

OCD - Getting Thoughts About Sex When Looking At Anybody

"Pure" OCD

For me it started later (16-ish maybe?) and still continues. It led me to doubt my orientation, but I don’t know that it was SOOCD per se. A lot of the time I am grossed out by the images. The teacher thing hit home though, because I have fears that teachers will rape me. Even now, I get uneasy about being alone with professors, even though I am bigger than all of them. 

I’m sorry you have to deal with that. Mine still occurs but it’s not nearly as bad as it was. I hope you find peace.