Should brand new underwear be washed, before it is worn?

I normally would not ask a lame question like this, but a new package of mens underwear i just purchesed, has me wondering. i use to buy my underwear with confidence and trust. this was because most of the underwear was made in the United States. now, the inside labels, state the underwear is made in foreign countries with names i cannot pronounce. is new underwear really safe to wear right out of the package or should it be washed first, especially for children?