Why is Chu Liuxiang called an old bug?

Chu Liuxiang's nose may be serious sinusitis from the perspective of modern medicine, that is, nasal congestion, so ordinary incense and ecstasy are not good for him, and nasal congestion is equal to nothing. According to legend, this bug has no nose, so Hu Tiehua called it a bug.

Because everyone calls Chu Liuxiang "Xiang Shuai"? But is Hu Tiehua Chu Liuxiang's good brother? Two people often joke? Hu Tiehua doesn't think Chu Liuxiang smells good at all? So I called him "smelly"

Because they are good friends, Chu Liuxiang smells good, so they make fun of him.