Conceptual based art

Tino Sehgal is a conceptual artist that likes to do art based on people's performances with the environment.  Sometimes, the viewer is also a part of the art without knowing that they are.  Here, this piece pf art is called Kiss 2004, a performance based art at the Guggenheim museum. The 2 kissers did that for longer than an hour straight. An article about Tino states, "Tino Sehgal specializes in “situations”. A student of dance and political economics, Sehgal enlists performers (some professional, some not) to participate in events that actively set out to involve the viewer."(mnaves.wordpress.com)  I think this type of art should be equated to onstage productions- just that they are off stage and injected into real-life situations. It is pretty cool and it makes viewers remember it more.