There are eight chairs around a table. There is a mom, grandpa, sister, brother, aunt, grandma, uncle, another sister, another mom, another brother, a dad, a father-in-law, a mother-in-law, another dad and one more uncle. They're all seated comfortably. How is this possible with only eight chairs?
The mom, grandma and mother-in-law are all one person. The mom, aunt, sister are all one person. The brother and uncle are one person. The Dad, father-in-law and grandpa are one person. The sisters are one person. The brothers are one person. The uncles are one person. The dads are one person. Total amount of people is 8.
You walk across a bridge and you see a boat full of people yet there isn't a single person on board. How is that possible?