Suroor’s information about the nose rings, worn by South Asian girls (the nose hoopring being common for brides) caught my interest. So I went on an information digging spree and
came back with this:

It is widely believed and thought that the nose is exclusively for sensual smell and breathing only. But in a well established practices, this theory manipulates, that it connects with emotional, sexual and romantic propositions too! That’s what the decorative ornaments and jewels to the Nose apparently causes – not only beautifying, but also significantly adds value to the marital life as well! No doubt, it is very very attractive and can accentuate the facial uplift because nose is the most prominent and overall it adds value to the face by its natural positioning. Think of a person without a nose! Yes, even Leonardo Da Vinci noted and commented that the nose, among the whole face, sets the part of a person’s Character.

And linking back to Suroors initial comment, the article also stated:

In India, the deflowering of a virgin is symbolically referred to as the removal of the “Mookuthi” known as ‘nath’ in northern part of India or nose ornament. Normally, widows remove this nose-jewel, but now a days even this practice is stopped mostly

Some even link the nath as a symbolism –
in novels – for being “captive” or “caught”

The women’s nose rings and discs are called ‘nath’ – which means ‘caught’ or ‘captured’ and in wedding jewelry the nath usually is attached to a chain that is attached to another ornament worn in the hair. So the nath looks very much like the reins attached to the nose pegs of camels, and probably was what made the connection in my mind. The camels’ nosepegs and reins are primarily for control – and in that sense they’re related to ownership.

However, the use of nose rings, and its significance historically and culturally vary from culture to culture and so the above cannot be applied generally to all. There is a different understanding of nose rings in Western cultures compared to the East.

It was interesting information dig nonetheless!

Here’s more on Traditional Indian jewellery