Exactly the number of hairs on your head ballsack facer biatch with a dick unicorn horn on drugs.
well, there are two balls in a sac so...
your testicles
ball sac
between yo legs
My ball sac
scrotum, sac, basket
In the first developmental stage of the embryo, you have the ball of cells. In this ball of cells you have cavity filled with fluid called amniotic fluid. This fluid sac separates the embryo, from the outer non-embryo cells. Later on it encloses the fetus in amniotic fluid to give amniotic sac. This sac is attached to uterus from inside.
ball sac
ball sac
To help keep the scrotum warm and help with sweating.
Because, there is follicles there and it helps with temperature control and sweating.
my ball sac