Wanted: My need in life...

Do we know the difference between needs and wants? As children we are taught the values of having what you need versus what we want. So what changed? How did we forget? Did it happen when we got our first job and paycheck which enabled us to make to supply those wants? With enough addressing our own wants with whatever our heart's desire what happened to the needs of us? is there a difference? Did we need those things we wanted?