Cat Fights

Two girls in my class, Samantha and Sheri are at each other's throats for a third time this year. Could be more though. But anyway we were at a party last night and we met this cool guy and he took a liking to both and they both took a liking to him. So he told both of them he likes them. Samantha mentioned it to Sheri and vice versa. Then Samantha said to Sheri, "Dream on. No one could ever like you and you should realise that." So now they're fighting and Samantha is turning all against her once again, especially her back up Betty.

Why do girls have to fight for stupid reasons?