There was this family with one kid. One day the mother was out and dad was in charge of the kid, who just turned three.
Someone had given the kid a little 'tea set' as a birthday gift and it was one of his favorite toys. Daddy was in the living room engrossed in the evening news when kid brought Daddy a little cup of 'tea', which was just water. After several cups of tea and lots of praise for such yummy tea from father, kid's Mom came home.
Dad made her wait in the living room to watch the kid bring him a cup of tea, because it was 'just the cutest thing!!'
Mom waited, and sure enough, the kid comes down the hall with a cup of tea for Daddy and she watches him drink it up, then she says to him, 'Did it ever occur to you that the only place that baby can reach to get water is the toilet??'
MORAL OF THE STORY:
Domain knowledge is very important!!! Else your supplier will trick you......