# Coulomb interaction as virtual particles exchange?

I've been reading about virtual particle exchanges in physics books and in Physics SA posts, where a particle interpretation of gravity and Coulomb interaction is established. The Feynman Diagram picture (combined with the snowball picture that a fellow contributor provided in a related post) serves to account for the repulsion part: grosso modo two particles in motion, a virtual photon/graviton, momentum change induces opposite motions ($\Delta \vec p \$ and $\ -\Delta \vec p$). Still, how can we account for the attraction (as a layman's analogy if not in formalism)?