FWIW, it took me about 10 years to understand this joke, as a non-native speaker who would read "dot" as "punto". For a very long time I thought it was a play

FWIW, it took me about 10 years to understand this joke, as a non-native speaker who would read "dot" as "punto". For a very long time I thought it was a play on "./" in the unix sense.