Q&A session

Their conversation in the car one day..

Emmett: Eugene, what's 2x2?
Eugene: 44

Emmett: What's 1+1?
Eugene: 11

Emmett: What's Eugene + Eugene?
Eugene: Happiness all around the world.

Emmett: What's Emmett + Emmett?
Eugene: Destruction.

Emmett: What's Eugene + Mummy?
Eugene: Argument error.

Emmett: What's Daddy + Mummy?
Eugene: You and me.

Emmett: What's Emmett + Eugene?
Eugene: Yin and Yang.