I agree- this will only become a bigger problem. You need to stop the behviour. When he bites you you need to make a yelp sound and get up and leave. His litter mates would have done this and he would find out quite fast that biting is not the way to get attnetion.
Some people say to replace your finger with a toy but i think you are just rewarding his biting you. you can also get Bitter Apple and spray it on your fingers and toes- it will probably be the last time he bites you! but just make sure to wash your hands after
