Why do girls call them pigs and boys call them big pigs? Why? Please explain.

This needs no explanation. The girl's name is piggy, which means you say you are cute, which means I know you very well, and you will find piggy. It's unfair to call boys big pigs. How can it be unfair? And fair. Generally, people who are very hot and hard will call big pigs, pigs and piglets bark, bark, bark!