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.
Asparagus contains sulfurous chemical compounds that give your urine an unusual odor. It doesn't happen to everyone, but it's relatively common. It happens quickly, too, so if you've eaten asparagus and you haven't smelt something funny the next time you pee, you're not one of the lucky ones who have this reaction.