Fly Away Hair

Andrew wore blue jeans, black tennis shoes, a black crew neck sweater with a navy blue polo shirt. One side of the shirt collar was still buried underneath the sweater.
 
He had fly away gray hair and a matching beard and mustache. I think he wore glasses, but I paid more attention to his clear blue eyes.
 
"Where'd you go to college?" I asked.
 
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Is there any significance to Andrew's fly away hair and his shirt collar half buried under his sweater? What do you think?