Can someone simplify what this means? Boy is Pisces, girl is cancer.?

Simplification: DONT TAKE ASTROLOGY SERIOUSLY! It is just a fun thing to read in the paper before work. It is a bunch of Bull Sh*t! That is a fact. What about all the girls who are pisces, and boys who are cancers, who get together and have HORRIBLE relationships? Just find a man who will treat you right, regardless of his or your sign. 'nuff said.