Fake OCD

We are know John's OCD is fake. It's an identity he stole from Howard. However, it is satisfying when he reveals himself that it is fake. In the wake of the playing of the tapes at Dabblecom, SJ vehemently denied he had any sexual interest in Kate. When people weren't buying this lie, he went further and said that he couldn't possibly have any sexual interest in Kate because he swore an oath to himself that he would never sleep with anyone younger than his oldest child. He went further and said that as an extreme OCD sufferer once you make such an promise it is impossible to break.