What are the metaphors of grandpa's beard?

1. The old man stroked his beard as he listened, like a dry corn beard.

He has a big beard like Santa Claus, temples and cheeks as white as snow.

Grandpa's beard is like a brush.

He has a sparse beard, like a dry millet root.

He has a white beard like Christmas, sideburns and cheeks, and he is black.

6. The man's face is full of beards like knives and guns.

7, curly, like a handful of sparse beards slanting and swaggering.