Never let authentic pronunciation stand in the way of a good joke !
Or accent.
Except they generally work only if you're monolingual: I rarely get them because my linguistic training kicks in immediately & I just don't see the joke, but I don't suppose that matters to others...
Oh, if you lived in the country and heard how most English people pronounced the words, day in, day out, you'd get the joke very quickly (which isn't supposed to sound snotty, it's just funny).