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.
A linear electron geometry involves a central atom with two pairs of bonding electrons at an angle of 180 degrees. The only possible molecular shape for a linear electron geometry is linear and is three atoms in a straight line. An example of a molecule with a linear molecular shape is carbon dioxide, CO2. Trigonal Planar Electron Geometry