In the medieval Welsh tale of Culhwch and Olwen, Olwen is said to
have hair yellower than the flowers of the broom and cheeks redder than the reddest foxgloves. The description continues with further superlatives based on comparisons to specific natural things; “Whiter were her palms and her fingers than the shoots of the marsh trefoil from amidst the fine gravel of a welling spring….”.
I have a theory that simile is more appropriate than metaphor to present a polytheistic view of the gods. You can follow the disscussion