When Vyasadeva was following his son, Srila Sukadeva Gosvami, they came upon some damsels bathing in a pond, Sukadeva was also naked, yet the maidens did not cover themselves when he passed by. However, they did cover themselves when the fully-clad Vyasadeva approached. Astonished at the apparently inconsistent behavior of the young girls, Vyasadeva asked them to explain. “Your son is purified of all material contamination,” they said, “so when he looks at us he makes no distinction between male and female. But as a householder, you do make such distinctions. Therefore, while we feel no shame before your son, we must cover ourselves before you.
The Hare Krishna Movement 