How would you explain to your teenage son what aftershave is?

Hi gents,

How would you explain to a teen who just started shaving what the purpose of aftershave actually is? I've actually always wondered why we can't use cologne in place of aftershave too - they both have alcohol in them right?

I came across this article that seems to give an explanation. Not sure how much of it is truthful? What do you guys think? https://www.groomjournal.com/what-does-a...to-use-it/

Thanks,
Kevin