Some adorn Thuiruthuzai on their ears, what is the reason behind it? If so, should it be adorned inside or outside the earlobe?

Scriptures have stated Thiruthuzai must be worn on the ears. As per the line ‘karnamulE tu tam trutvA’, flowers should be worn on the hair and Thiruthuzai on the ear lobes. As it is karnamulE it appears it can be placed on the outside of the upper ear lobe. Adiyen had seen our elders placing it on the inside and not on the outside; as per our sampradaym, we must place it on the inside of our ear lobes.