What is attachment?

Short answer
An octopus with gazillion arms, trying to stay connected with everything.

Long answer
Imagine you are an octopus with gazillion arms clinging on to gazillion things. Each time an arm is detached from any of its object, there is a disappointment. This proves the very fact that you were attached to that object. Let’s take your TV for eg. The moment your TV is taken away, the arm snaps back to its position of being suspended in mid air with no support. This feeling of not being associated with the object of your desire any more, makes you uncomfortable.