Little Boy Wants To Use His Mom's Breast Pump

Straight forward is this one. A little boy is sitting with his mom while she uses a breast pump. We can hear the pumping sounds that the device is making. The little boy is looking at his chest, having pulled his collar down a bit. He tells his mom that he would like to try and use the breast pump. She tells him that he does not have milk in his boobies. He keeps demanding that she let him try the breast pump. He just doesn't quite get that it is not a device that he can naturally use. Instead he pulls at his own nipples trying to get milk out.