An ear earring
No, they aren't real human body parts. Percylau at Etsy will sell you a tiny body part made from Sculpey clay that you can then hang from your own body parts.
This ear earring wears its own earring.
If you're fond of puns, you can wear this.
"It's my ear ring."
Noses and more intimate body parts are also available.
- Little Third Ear, Etsy>>
Found via Book of Joe, who found it via the blog Things that look like other things>>