system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can I pick up my little brother, who weighs around 100 lbs with no issues, but I struggle just trying to get a 50 lb weight off the ground?
gpt
A big thing to remember is that when you pick people up, they are actually helping you. When picked up, people uncounsciously shift around to get their center of balance just right so they wont fall, and it helps out the lifter.

If you tried picking up an unconscious or asleep (or dead) person for example, you would have a veeerry hard time because they are no longer helping you and their center of balance shifts wildly.