Actually, we have astrology matching characteristics because animals have hormones, and hormones change with the seasons. Our mother's hormones when we were conceived and when we were born, our father's hormones when we were conceived, these all influence our behaviour, for our bodies try to give us the best internal environment so as to survive our external environment on the day we are born.
Pisces are happy go lucky, not competitive, they are born in spring, when there is a lot more food to be found when hunting, as more animals are out and about. It would not be easy on the parents, and rather unnecessary for the child to be greedy and take in much food.
Scorpio, born at a time of the year when the animals are getting scarce, when people used to fight each other for food, before settling into caves or houses for the winter, a time for fighting and paranoia/caution.
Virgo, paranoid to the extreme, quite, contemplative, craves security and sameness, a time in the year when such a baby's temperate makes it easy on a parent rationing food.
I grew up on a farm, I noticed these same characteristics among our cattle. We farm kids sometimes think, you know.
However, I did have a cousin who molested a goat, but that's a different topic....