Portuguese artist Alexandre Farto (aka “Vhils”) - Lisbon, Rua de Cascais in Alcântara near the Santo Amaro Docks and represents the American street artist Brad Downey, his friend. (all rights reverved by Lisbon Lux)
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.