When did kids discover your underwear

[ioanniskef]

I dont have kids , but my very best friend has a don of 3 years old.
My friend and his wife are 24/7 thongers and wearing them exclusively as underwear and swimwear. I know that in their household there is not even a single pair of full bottom underwear..hehe...
They both wear them in front of their son, not only at the beach but also at home where most of the time are only in a thong.
Their son knows very well what dad and mom wear.
Often they questioning themselves or me if their son will follow their example and become a thonger or not.
Because we all know that as a free person he might do a different choice of his own preferable underwear style.