[yencabulator]

If it can be taught to a teenager in a couple of days -- which is how many fast food employees get started -- it's not a "skill" in the context of https://en.wikipedia.org/wiki/Skill_(labor)

[yterdy]

>If it can be taught to a teenager in a couple of days

Most can't. Hence the frustration you are likely to feel dealing with a teenager in his or her first week on the job.