Hello:
Rather than pointing to a genetically determined mental problem in itself, --- OCD can indicate that one is not using one's mind as efficiently as one should. Obviously, order is always preferable to chaos.
For the OCD sufferer, it is the inability to maintain one's attention on the present that causes the problem. As an example, one of the symptoms of OCD is the need to repeatedly check something such as locking a door.
While it is said that a genetic flaw or a chemical imbalance is responsible for such behavior, I beg to differ. I say that it is caused by poor mental habits. Some achievements seem to be so simple that only a small portion of one's attention is required to successfully complete the task.
The OCD sufferer must learn to pay more attention to the locking of the door and not unduly allow his or her attention to wander in other directions.
The fact that you must check again to see if the door is locked indicates that you did not pay enough attention to this simple achievement in the first place.
Simply put then, --- we are dealing with a behavioral problem. The individual who is suffering from OCD must pay more attention to what he or she is actually doing; rather than "day dreaming" about other things.