The body's natural reaction to this imbalance is to bring on a whitey, and the sheen is a key indicator that this is about to happen. Diagnosing the arrival of a sheen is a crucial element of whitey management and can provide invaluable planning time prior to a tactical chunder.
This should not be confused with Dr Clam.
I can't believe John treated us all to dinner that is so sheen.
That's a sheen pair of shoes you have there.