Pit Bulls? I've seen big Pit Bulls who had toddlers climbing all over them, pulling their ears, poking where they shouldn't, & the doggies seemed to love the attention. The doggies had daddies who were well trained as doggie daddies--they knew the value of training the doggies well, and the children as they grew older, too.
I've also known people who had no understanding of the need for dog training-where the human is trained to "train" the dog. Their dogs, no matter what the breeds, are always ill mannered.