A little girl wants to buy a cake.
But the cake is not selling in pieces.
The cake priced at $6, but she only has $2. To purchase the cake, she has to find the other $4.
She starts looking for her friend that has the same interest in buying the cake.
She found two of her friends who are willing to spend $2 together with her to buy the cake.
Three of them got a total of $6 to buy a cake.
After they bought the cake, they cut it into three pieces, and each piece worth $2.
Sharing the cost with the people who had the same interest as you, can bring more benefits for your financial, avoid spending on unnecessary extra portions.