Fun and Fun only - Is there any meaning in this proverb?

ராஜாவுக்கு ராணிமேல ஆசை ராணிக்கு '' donkey '' மேல ஆசை. (Raja loves Rani, but Rani loves donkey) i don't find any meaning in this proverb, but it is a familiar proverb in tamilnadu. If you find any meaning, please come and explain.