I've read a similar article about OCD once. Here's an excerpt:
Thirty-year-old Ruth has a long-standing feeling of contamination that compels her to carry out numerous cleansing activities each day. She becomes intensely uncomfortable when she notices any dirt on herself or in her immediate environment. Whenever she detects the pretense of even the smallest bit of dirt, she thoroughly washes her hands and arms. If she finds any dirt in her apartment, she feels compelled to scrub it from top to bottom, then shower in a rigidly specific manner. She also feels contaminated after using the bathroom, doing housework, or cooking, again feeling compelled to wash herself after these activities. Currently. she is washing her hands at least three or four times an hour, after showering six or seven times a day, and thoroughly cleaning her apartment at least twice a day.
She has been diagnosed with an obsessive-compulsive disorder.
-Leon, G.R. (1990). Case histories of psychopathology (4th ed.). Boston: Alynn & Bacon.
The book also said that OCD isn't that uncommon, and the most common types are excessive checking, cleansing, and counting.
I guess as long as it doesn't hinder your daily activities, or as long as it doesn't prevent you from functioning properly as a human being, then it's okay.