It's immoral to masturbate onto or into other people's things.
James is very unhappy in his low-paid, dead-end job at Subway with a vindictive manager.
James wants to get revenge on his manager.
James waits until the store has a massive catering order and walks off the job.
James masturbates into the tub of mayonnaise he puts on the customers' sandwiches.
James' manager has to struggle to make 200 sandwiches by himself.
James is caught on the store's security cameras and immediately fired, as is his manager.