When it's full, you get the urge to have a bowel movement. If you search your computer you will probably find some crapware webcam photo. How do you use the camera on a hp mini?
The rectum is the end of the intestinal canal. Your webcam may be turning on and taking pictures by itself due to malware or a virus that has gained access to your device, exploiting the camera functionality. To use the camera you need software too use it.
The noun 'toy city' (capitalized) is a proper noun, the name of a specific toy store. Its lower end is the anus, and it serves as a storage area for feces.