Actually, germophobia exists in over 90% of recorded OCD cases. Germophobia is usually an outward sign of a much higher degree of mental dysfunction. If left untreated and a victim of their fears, it usually spreads to anal retention (wiping until ass bleeds, using wet wipes rather than tp, fear of defecation, colonic scrubbing rituals). Social problems like agoraphobia, anti-social personality disorder, etc...

Your coworker probably has some odd bathroom habits if said coworker won't drink from a bottled water source.

After living with/dating a germophobe for 6 years and realizing what a selfish self-absorbed piece of shit every germophobe I've ever met is... I immediately shun them. Call me a dick, but people who can't see outside themselves and who impose their fears on others are worthless to me.