I haven't seen the sexual side effect listed in any of the medical literature. I have seen however some patient reports that it may decrease sex drive in males. One possible reason is as a stimulant it can increase blood pressure. High BP can be linked to impotence. Maybe this effect is more linked to your OCD? Maybe the Adderall changes the brain chemistry in some way that make this behavior more pronounced.

I'm just guessing here. I have not noted any change in my sex drive after starting adderall.