Online social networks have long been studied by researchers to unearth the common patters of socializing among human beings. Recently, there is considerable interest in Internet-of-Things which is an interaction of smart physical objects augmented with sensing devices. However, there is hardly any research on intra-smart object interactions and interactions among smart physical objects and humans. In this paper, we considered a common network of human and smart physical objects, called Socio-Physical Interaction Network (SPIN), and studied their joint interaction patterns and underlying properties. Our extensive experiments prove that that the SPIN sports common social networking properties.