Dale and Johnson recently showed that PCM reduces DEs and reproduces linear fractional charge behavior in DFAs because the polarization energy can be expressed as a quadratic concave down function. Due to the overstabilization of fractional charge caused by DE, DFAs show a convex departure from the expected linear fractional charge behavior between N and N+1 electron systems. Therefore, common corrections counteract the DE by introducing a concave down fractional charge term that localizes electron density. Typical examples include the Hubbard Ucorrection in DFT+U, an admixture of Hartree-Fock exchange globally or with range separation in hybrid functionals, and a general polynomial in jm-DFT. The quadratic concave-down function form of PCM also has electron localization effects. Hemminsen, Hervir and Dale demonstrated the impacts of PCM in reproducing the linear fractional charge behavior for 147 small molecules. The work provides an insightful explanation of the counterintuitive density localization observed in PCM calculations and has discussed the possibility of using PCM to reduce DEs to improve the prediction of molecular properties.