Krishna is Nitya, Ajanma, Akhanda Brahmachari

KRISHNA is NITYA BRAHMACHARI, AJANMA BRAHMACHARI, AKHANDA BRAHMACHARI
- Ref: Bhagavata Purana, Bhagavad Gita, Mahabharata, Vishnu Purana

Krishna had mainly eight wives, he was called Ashtabharya (ashta=eight, bharya=wife) because of that. Different  scriptures list their names differently. According to Bhagavata purana names of the eight wives in order were Rukmini, Satyabhama, Jambavati, Kalindi, Mitravinda, Nagnajiti, Bhadra and Lakshmana.

Story of 16,100 wives
Narakasura=Naraka+asura; naraka was his name, naraka also means hell, he is considered the son of mother earth thus called Bhaumasura (son of bhumi, bhumi=earth). Asura means demon.

the demon king Naraka had kidnapped 16,100 (some sources say 16,000 probably for the sake of ease) women and held them in his captivity in his capital Pragjyotisha.

Naraka had stolen the ear-rings of Aditi (daughter of brahma, first nascent being), her sons demigods were unable to fight against Naraka. Upon their request krishna along with his wife Sathyabhama attacked Pragjyotisha on his vehicle Garuda (eagle) and fought a fierce battle against the demons, in that war many powerful demons were slayed by krishna. Most important of those were Mura and Naraka. 

(Narakasura had the curse of being killed by his own mother, Sathyabhama is considered the incarnation of Mother earth, thus she killed Narakasura)

After killing Naraka, krishna released 16,100 women that Narakasura had in captivity. When krishna asked them to return to their houses, they refused. They were aware that the society of that age would not take back those who were taken by another man. So they were left with nowhere to go.

When Krishna asked them what they wanted to do, they all wanted Krishna to marry them.

Krishna married them all at the same auspicious time assuming that many bodies, so they could gain status of married women and live in the society with honor again. Krishna constructed them each a palace with huge gardens ful of colorful flowers, It was impossible to live with each of them so he created 16100 forms of himself so that he could treat them all in the same manner as his 8 wives. Scriptures say that each of them had 10 sons and 1 daughter. All of them equal to their father in the opulences of strength, beauty, wisdom, fame, wealth and renunciation. "Like father like son." 

Note:Some stories say that each of 16,100 women were rishis from the past who wanted to be part of Lord's incarnation on earth. Who wanted to live closer to him and witness his life. Upon their prayer to lord vishnu he granted them the boon to be his wives in his next incarnation on earth.
(http://aumamen.com/topic/16000-wives-of-krishna-spiritual-significance)

The Genealogical Table of the Family of Krsna
All the 16,108 wives of Krsna were princesses, and when each saw that Krsna was always present in her respective palace and did not leave home, they considered Krsna to be a henpecked husband who was very much attached to them. Every one of them thought that Krsna was her very obedient husband, but actually Krsna had no attraction for any of them. Although each thought that she was the only wife of Krsna and was very, very dear to Him, Lord Krsna, since He is atmarama, self-sufficient, was neither dear nor inimical to any one of them; He was equal to all the wives and treated them as a perfect husband just to please them. For Him, there was no need for even a single wife. 
(http://krsnabook.com/ch61.html)

Interpretation:
8 Principal wives - Senior Disciples
16100 Gopis - Other Disciples
As light travels in multiple directions, so is The Light - Krishna manifests in multiple places at the same time and so he is very much with all of them at any point in time.

Krishna revives Abhimanyu's son:
Uttara delivered a child which was dead. All the women approached lord Krishna to bring the baby back to life who was the only successor of the Pandava dynasty. Krishna poured a few drops of water on his hands and said, "If I have truly followed Dharma/Brahmacharya/Celibacy throughout my life, then let this child come back to life". He sprinkled the water on the child and touched him on his chest, reviving Abhimanyu's son. Later, Abhimanyu's son becomes an ardent devotee of lord Krishna and was named Parikshit (the one who has been tested, when he was in his mother's womb; Lord Krishna rescued him in the womb). The Pandavas ruled for 36 years. After the end of Pandavas, Parikshit ruled Hastinapur for 27 years and was succeeded by Janamejaya.
http://en.wikipedia.org/wiki/Ashwatthama

Interpretation:
Brahmacharya comes from the words BRAHMAN, (which means GOD) and  ACHARYA (one who practises). Brahman-Acharya means "practising union with the supreme God".

Brahmacharis are the ones who transmute their sex energy so that the higher chakras are activated. Once the upper chakras are highly activated they can practise union with their higher soul and union with God.

That is why Krishna was a true Bhrahmachari. He is already an illuminated soul. Also the union of Krishna and Gopis were not on the physical level. It was the union of the two souls.The stories say how the Gopi's were at rapture to Krishna's flute.It means that the Gopis were so absorbed and raptured by the Divine energy (music). Krishna with his enchanting melodies of his heavenly flute is calling all the devotees to the bower of divine union in samadhi meditation, so as to bask in the blissful love of God.

For Gopis, it was transmutation of Lower energies (sex energies) to higher energies. Sex energy in the sex chakra when transmuted to heart chakra becomes love, When it comes to Agna chakra becomes Divine will, and it becomes divine spiritual energy at the crown chakra. Gopis were practising this union  with the parabrahman, who was none other than Krishna himself. The 11 kids (10 boys and one girl)refer to the 11 major chakras. The eleventh girl kid symbolises the Basic Chakra also referred to as Kundalini. The Kundalini is also known as the "SLEEPING BEAUTY" 
http://spiritualtorch.blogspot.in/2013_03_17_archive.html