There is the following statement by one gopī, describing Kṛṣṇa's attractive feature during this age: "My dear friend, just see how all of a sudden in the sky of Kṛṣṇa there is a powerful rising sun and how this rising sun is minimizing the rays of our chastity moon. Our attraction for Kṛṣṇa is so intense that it is drying up the lotus flower of our discrimination, and we are losing our senses in deciding whether we shall continue as chaste women or be victimized by the beauty of Kṛṣṇa. My dear friend, I think that we have lost all hope of life!"
In the kaiśora age, beginning from the eleventh year and continuing up to the end of the fifteenth year, Kṛṣṇa's arms, legs and thighs became marked with three divisional lines. At that time Kṛṣṇa's chest challenged the hill of the marakata jewel. His arms challenged the pillars of the indranīla jewel, the three lines of His waist challenged the waves of the River Yamunā, and His thighs challenged beautiful bananas. One gopī said, "With all these exquisite features of His body, Kṛṣṇa is too extraordinarily beautiful, and therefore I am always thinking of Him to protect me because He is the killer of all demons."
The idea expressed in this statement is that the gopīs were comparing their attraction for Kṛṣṇa to an attack by demons; and to counteract their attraction for the beauty of Kṛṣṇa, they were also turning to Kṛṣṇa hopefully, because He is the killer of all kinds of demons. In other words they were perplexed because on one hand they were attracted by the beauty of Kṛṣṇa, and on the other they needed Kṛṣṇa to drive away the demon of such attraction.
This kaiśora age can be translated as adolescence. At the end of this period all the gopīs said, "Kṛṣṇa is the killer of the attraction of Cupid, and as such He disturbs the patience of all newly-married girls. Kṛṣṇa's bodily features have become so exquisite—it is as if they are all manifesting an artistic sense of the highest sort. His dancing eyes have dimmed the brilliance of the most expert dancer, and so there is no longer any comparison to the beauty of Kṛṣṇa." Learned scholars therefore describe the features of His body at this time as nava-yauvana, newly-invented youthfulness. At this stage of Kṛṣṇa's bodily features, the conjugal love affairs with the gopīs and similar pastimes become very prominent.