Last night he caught my hand drawing blood (not a lot ) so I yelped with pain and moved away from him as normal and as normal his response was to run after me and attach himself to the bottom of my trousers by his teeth 
Molo does this when he gets tired, hungry or overexcited - first thing in the morning he can literally dangle off my trousers
I have considered it to be just normal puppy behaviour, and have been following the advice that has already been given, yelp, ignore, isolate. We to are limited as to how we can isolate him; but find that moving to another area of the room with our backs to him, and our attention firmly on something else seems to have an affect. It can get too much sometimes, and when icos it hurts it is really difficult to flinch or pull away every time he eve nsniffs your face/arms or hands
They sounds very similar in that Molo also allows me to put my hands in his mouth, and he has settled really well, not possessive with toys or food, very little crying at night or when alone, and picking up basic commands well - in fact I have been thankful that he is very much 'The Perfect Puppy'
Try not to worry to much, as I am sure that doggies of all ages can sense anxiety, and respond to it. Also, and this is really hard, I have given Molo times to 'play' with my hands, without me flinching in anticipation of a nip
, so that we can practice the yelp/ignore technique.
My first training class was so funny, we all had to sit on the floor with our pups, and Molo was constantly bouncing around and nipping my hands, face, arms etc. All the others were sitting calmly, listening to the tutor, and every two seconds I would 'yelp'
When I really want to give him a cuddle, I make sure I have got a raggy toy in my hands and refocus his attention on that each time he moves to nip/chew me!
As for meeting other people, I want to make sure that Molo is well socialised with loads of different people, so if people come up to him, and ask whether they can pet him, I always say yes, but warn them that he is still at the 'nippy' stage...most people understand, and move away if/when he nips them.
Try not to worry too much, I am sure it is just a phase that will consistent training he will grow out of
If you would like to PM me, we can chat further if it will help. My OH has been far less able to tolerate this from Molo than I have, so I do understand it can leave you at your wits end
