This is all normal puppy behaviour - this is NOT aggression, it's play behaviour to learn how to act as adults. The humping is not sexual.
Normally the pups would learn from each other and from their Mother what is acceptable behaviour, they really need this socialisation period to grown into adults with the skills needed for interacting with other dogs and with people.
IS there no way the litter can be brought up together? This would be the best way to ensure happy, sociable adults.
If he bites then you need to say "OW" very loudly and withdraw your attention from him, this is what his littermates and Mother would do.He will quickly learn that the game stops when he bites - IMHO and experience you can let them mouth your hands gently [obviously do not encourage it, it's not a game] but NOT bite you, so they develop bite sensitivity, This is what they would learn from littermates and that way if they ever find themselves in the situation of a bite they know that it is not acceptable to apply pressure.
Familiarise yourself with Ian Dunbar's articles and free downloads
http://dogstardaily.com/free-downloads
it is ESSENTIAL that this is handled correctly, and you need the information to raise the puppy up successfully.
What are you going to do with him during the Wedding?
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