This is not about “Selsun” Blue Shampoo, it is about “Selsyns.” The electric kind. So if you are looking for hair care and styling advice I am NOT your guy. “Selsyn” is one of the names bestowed upon a group of motors that also include such terms as “Synchro” …”servo” …or “rotary transformer” Selsyn is… Continue reading Selsyn not Selsun …the electric dominatrix …and a not-so-often acknowledged fact about the master-slave relationship.