Homo internetus is lack of a companion to scratch its back. Wall mounted self-scratching apparatus in a common space. Mechanical hands are placed separately on different heights. Each mechanical hand will be set in by a motion detector (PIR) solely. Ferdinand Tönnies simply describes the community on Gemeinschaft und Gesell-schaft in 1887, with the diversity between profit based and accidental relationships in city life. Scratching is a unilateral and also private action. This action could be seen as a profit based manner, do we ask for a reliable communicaton before resign into somebodies hand? Should we consider the borders of confidence before the submission on the urban space? How common-itchy examines the interconnection between these two relationships and is it possible to provide a public invention?

Ahmet Sertaç Öztürk