Young dragons will also use biting to assert dominance over their slaves. Whilst they're small, that's not too much of a problem, as they can't bite all that hard and their teeth are only wee - but when they get bigger, if it's not been dealt with, it can be very serious and they can do serious damage.
Luckily, all dragons are pretty darned smart. Keep doing what you want to do, not what he wants to do. He'll learn quickly - the worst one I had took six weeks to understand his nasty attitude wasn't going to wash with me. Of course, don't ever hit or hurt your lizard, but do be firm and gentle.
Late in the evening, before he goes to sleep, that's a pretty good time to handle too. He'll be sleepy, starting to cool down, less likely to give you trouble and more likely to relax and accept stroking and gentle pets.
If needs be, use bike gloves as a temporary measure. I have a pair of kevlar and goretex reinforced gloves for dealing with violent, mature lizards - some of my rescues have been real nasty pieces of work, but with patience and care, they've all turned into model beardies.
Jacques went from this bundle of bones and violence that could bite through bamboo poles, charge a fully grown human and hung onto the ends of my gloves like a bulldog:
To this chilled out and huggable little dude:
Likewise, my other bundle of insanity, Frank - heck, if anything, he was worse. He used to leap for your fingers and full on savage anything that got close to him... Well, he's turned into a right little star:
These days, both boys understand that "attack" from a human is just playing. Frank's even learned some basic commands - like if he's being unreasonable, kicking and scratching and wanting to get away or be snippy with us, we tell him "FISH!" and he sits still. (It's his nickname because he can be so darned wriggly, and he's associated it with his behaviour and positive reward for positive behaviour modification).
