A proverb meaning 'there's no accounting for taste' or 'to each their own' — people have different likes and dislikes.
私にはその絵の良さが分からないが、蓼食う虫も好き好きだ。
I don't see what's good about that painting, but to each their own.
辛い料理が苦手な人もいるし、好きな人もいる。蓼食う虫も好き好きだね。
Some people dislike spicy food and others love it — there's no accounting for taste.
彼の服の趣味は独特だが、蓼食う虫も好き好きと言ってあげよう。
His taste in clothes is unusual, but let's just say to each their own.