A brain chemistry / hormone question...?

Your description of a "warm, almost electric sensation" leads me to believe this is an increase in circulating oxytocin levels as a result of social interaction. Commonly seen in mothers tending to babies, this chemical helps formulate a relational connection by producing a "warm and fuzzy" feeling. Likewise, oxytocin is the chemical that instigates emotional attraction between lovers. Your ability to characterize such an experience is remarkable. Perhaps you contain more robust oxytocin neurons within your skull than most people. :)