Due to the law of conservation of mass, shrek must not actually become lighter when he becomes human. Because of this we know that the amount of skin and blood in his body must remain constant. However, visually, we can see that human shrek is smaller. It’s quite the predicament! But there is one possible way that shrek was able to tuck that meat away somewhere, and that’s in his meat! Because of this fact, human shrek, oddly enough, would have a inhumanely massive cock! In addition to this, human shrek has an ogre-appropriate amount of blood. But that much blood could never fit inside a human body! This means that all of this blood must be contained in his massive meaty cock. Due to the amount of blood required to be housed in his cock, we can also conclude that human shrek is constantly erect, with his engorged cock standing at full attention 24/7.