I asked the internet 4 the etymology/meaning of the word 'musk'

It said
1. Comes from Late Greek word 'moshkos' meaning 'testicle'
2. Vulgar slang 4 the smell of unwashed genitalia

So, if it
looks like a ball-sac and
smells like a ball-sac then
by golly
he IS a ball-sac

HNY😊