It is assumed here that the Poiseuille number for the hypothetical lepton corresponds to a perfect sphere and is therefore equal to 1/3. This assumption is based on the understanding established from experimental measurements and standard model predictions of the electric dipole moment. As discussed in Hudson et al. (2011) , for instance, the electron shape only diverges from spherical above the limits of existing high-energy experiments, such as the Large Hadron Collider at CERN. Therefore, the hypothetical value of (𝑉 𝐴 s Δ𝑥 ⁄ ) 𝑁 𝑃𝑜 ⁄ for an electron or muon is assumed here to be 1/12 [-].