OCD begins with obsessions.  Compulsions are actually just a monstrous side effect of OCD.

Compulsive hand-washing is hard to hide.  Hoarding, definitely.  Even repetitive reassurance-seeking and confession (compulsions of choice for a Pure-O) are easy to notice once someone points it out to you.

But it’s harder to see the obsessions that are driving them.

Keep reading at The Dreadful O of OCD