Not funny? Well, you have to know that the word for “trial course” which is being used here — der Schnupperkurs — translate literally as “sniffing course”. Of course, now that the joke has been explained, it’s dead.
I was thinking (in my head) about how I would like to be able to "plug in" to something and just magically absorb the German lang. (for a future course I MUST take) and this pops up as a "suggestion". Okay SATAN, enough "unknowable knowledge" lolz