The two Japanese women are obviously very happy at the prospect of enjoying some pink pickles. So much so that they've written a song about them.
Oh, just so you know, pink pickles are the little bits of ginger that you get with sushi and not a European mans penis like you were thinking. The traditional Japanese pickling process turns the ginger a yellowish pink. These days it's sometimes enhanced with pink food dye. Occasionally other things like eggs are pickled using the same process resulting in pink pickled eggs.