I would say that it is like ohseedee says, they are most definitely intrusive thoughts. I have very bad intrusive thoughts as well and I am really impressed with your ability to admit the things you think. I've never even admitted the content of my thoughts to my pdoc/t, so you are very brave. I think the wiki thing is pretty accurate (surprisingly!) too. You are worrying so much that its causing reactions. When you are talking to your psychologist, if it would make you more comfortable, you can say you are having "inappropriate" sexual thoughts, and not go into more details about who, either way though, she will most likely say this is because of the ocd and not that you are weird.
I hope things get easier for you.