Infection’s Spread

Is knowledge like an illness?
Does it infect and spread?
Does it show throughout your body,
If it gets into your head?
And what symptoms should we look for?
Does plumbing cause a crack?
Must artists wear flamboyant scarves?
Must architects wear black?
Does it change your gender?
Does carpentry make you a man?
If I can’t see skills in a single glance,
Then, why do you think you can?