Lucifer: Why was Lucifer called a goat? Why is the devil portrayed as a goat man?

LUCIFER season 5 is coming to Netflix in 2020. Lucifer finally revealed his ‘devil face' in season 4 but why was he sometimes called a 'goat' by his brother Amenadiel and other Satanists? Express.co.uk has everything you need to know about the changing face of the devil.