This faux '80s instructional video explains how to overcome your fear of workplace defecation in eight easy steps. It's an important skill to master, since every time you use the toilet at work, you're essentially being paid to poop.
This is one of the many ways Europe is more advanced than the US. When I travel to my company's office in the Netherlands I always enjoy using toilet stalls that have real doors and a constantly humming ventilation system. The downside: at least in the Netherlands there is never hot water in the bathroom to wash your hands — they seem to pipe only cold water in there, so I would always wash my hands with cold water in the ladies' room and then stop into the fully plumbed kitchenette and wash my hands immediately again with warm water. Restaurant ladies' rooms also had only cold water, so I would use lots of soap and then rinse for a long time.