No, we do not all have a bit of OCD from time to time. What all people have are their own unique traits, desires, and quirks.
Most of the time, these quirks do not interfere in our lives or cause any significant distress, and therefore they are not classified as OCD. These personal traits can develop into OCD over time, but there is no guarantee that this will happen.
For example, consider that a man brushes his teeth in a certain order every evening, top front, top left, top right, bottom front, bottom left, bottom right. He may do this on a daily basis, and it is just a habit, one that he does not pay much attention to and that causes him no distress, so it does not meet the criteria for OCD.
Further, if he were to not brush his teeth one night, he might think nothing of it. Yet, say one night while brushing his teeth, he is interrupted by a telephone call, and the caller tells him some bad news. He hangs up the phone and finishes brushing his teeth.
The next night, as he is brushing his teeth, he may remember that he received a bad call while he was brushing. As he brushes, he may hope not to get another phone call and be very focused on the process of the brushing. Over time, as days and weeks pass, he may become increasingly focused on his brushing and hoping that he does not get a bad call.
The brushing and the potential for a bad call have become linked in his mind, so he begins to think that as long as he is not interrupted while brushing, and he does it in the correct order, everything will be fine.
As time goes on, he may find that the brushing gets rougher, or the pattern is repeated again and again, just to be sure that his teeth are really clean, because they were not really clean when the original bad call came, and therefore, maybe unclean teeth are a sign of bad things to come. This may lead him to start brushing his teeth multiple times a day to try to prevent more and more bad things from happening.
As you can see, there are many ways that an obsession and compulsion can develop out of one small experience.