<Snipped quote by Techspert>
OCD isn't an adaptive thing. It's a negative adaption that would result in being less likely to reproduce, hence not propagating. Problem is, the things that cause it aren't strictly hereditary.
Basically, OCD means my neurons have created connections in such a way that the "signal of completeness" doesn't get sent. You know how, like, if you were to wash something, you would eventually reach a point where your brain says "that's enough."? My brain just doesn't do that, so in order to get that signal of "that's enough" I have to do a lot more, or just go without it which can lead to severe anxiety. It's actually pretty interesting if you want to look into the disorder more.
I know; I'm saying that despite being a disorder, what the brain is trying to do makes sense, but it fails miserably at doing so. To a less extreme degree is OCPD if you want to look into that, which is what several "OCD" people and potentially myself have.
