Dogs minds work differently to ours!
I don’t mean to be rude but my puppy has bitten me everywhere where there is flesh and am I complaining? No. You’ve either annoyed him or he just wants to play (My puppy always wants to play) When they are with their siblings, they playfight and biting is a big part of that and it’s far easier to train a puppy than you might think. And if you want a pet that is already trained you are being very lazy. And I suspect you are the type of person that likes animals because they are cute.