#7 This is certainly also related to the individual character of an animal, but dachshunds are generally friendly and cuddly.
They like to be petted or have their stomach scratched and enjoy the attention of their people. Just because a dachshund is independent and often makes its own decisions does not mean that it is not a cuddly cheek.
#8 No dog is born biting. If a dachshund snaps or even bites, something has gone wrong.
He could have had bad experiences or was simply brought up wrong. For example, the dachshund seems cute to many people and it is therefore not uncommon for them to want to touch it.