Something fishy.

 It might have been a fly casting rod.

Rod Taylor, Rod Steiger, Rod Serling, Rod Cameron?

Mi casa.

 Home is where they change the locks when you go out.

Thus the saying, you can't go home again.

If you build it.

Dovetails on a birdhouse should be mandatory.

It's not a competition.

Dramatic license.

 Drama requires conflict.

Performance Art.

Bonkers.

 To quote Charlton Heston in Planet of the Apes:

"It's a madhouse, a madhouse !"

One hand washes the other.

 Just by coincidence...the most goodies.

They are working on the same projects.

Allergic anaphylaxis.

Duane, the human shield 

Charity by proxy.