Locked tummy

my 4 y/o son said the funniest thing ever.. 1 day i was doing our lunch dishes.and he came up 2 me & said this... mom,u love all 5 of us kids ? and i said i sure do,then he said i am ur last baby boy huh?! i said yes u r my last baby son & then he said that my baby sister is ur last baby daughter ? then again i said yes!! the he said mom,i know Y u can not have any more babies is b.cuz "GOD LOCKED UP UR TUMMY SO NO MORE BABIES ;-)" i will tell him in about 10-15 yrs.from now what he said to me...i've told a lot of ppl this & they think its so very cute...