The presence of obsessions or compulsions, or both, are what distinguishes obsessive-compulsive disorder from other conditions. The obsessions or compulsions cause marked distress, are time-consuming, and interfere with a person's normal functioning.
(1989) concluded that everyone excretes stinky compounds in their urine after eating asparagus, and the only variation is in ability to smell them. Other papers using chemical tests and carefully controlled smelling tests show that there is variation in excretion of sulfur compounds in urine after eating asparagus.
Not everyone seems to notice the change in urine smell; researchers have yet to determine whether this is because not everyone produces the amino acid, or because not everyone can smell it. In either case, genetic factors play a role in whether you can smell an odor of asparagus in your urine.