Fellow Y!A parents, how do i handle my 4 yr old son when he says?

I have the same problem. It probably is a phase and being spoiled too bc he is the baby and is home with you, that is what my hubby says about my 5 year old too. That I have spoiled him way too much and baby him. So it is probably a combo of both but what are we to do? It is our baby! I don't think there is a way to rationalize with that age! LOL!