No piercing is considered fully healed until it's a year old. Contrary to what you may read, it takes the body a full year to season a piercing to the point where it can be removed for extended periods of time without the risk of the piercing closing.
HBr is polar. The Lewis structure shows a central carbon atom forming four single covalent bonds with the four terminal bromines. The central carbon has no lone pairs and four bonding pairs, so the molecular geometry is tetrahedral (as is the electron geometry), and bond angles are thus approximately 109.5 degrees.
Crystal chemistry divides crystal structure into two basic types: homodesmic, or coordination, and heterodesmic. In the homodesmic structure, all of the atoms are bonded identically, the chemical bonds forming the spatial framework. There are no fragments that might be considered molecules. Homodesmic structure is found in diamond and alkali-metal halides.