In God's creation there is male and female even in the spiritual world and there is purpose for such creation. The purpose is so that male and female may join together, not for sex-life, but to glorify the Lord. In Vaikuntha the women are much more beautiful in their figure, smiling, dressing, etc., but the men and women there are so much attracted by the chanting of Hare Krishna that they do not get any sex impulse even by intimate mingling.
Letter to Uddhava, February 18, 1969