a girl had just recently broken up with her boyfriend
and it was her first time going shopping as a single woman.
so when she was in the super market she only bought one of everything, since she was only shopping for herself.
so she bought on box of cereal, on carton of eggs, only one carton of milk.
and, as she was checking out those groceries the cashier asked
"are you single?"
and she replied, "how did you know? is it because im buying one of everything?"
and he said, "yes"