Tail, mouth, and nose make up for dogs not having hands.
The wagging tail represents a waving hand, of course, and Sonya uses her mouth to carry around rawhide bones and grab my wrist to turn my attention to whatever she considers more important than revising Princess of Bosque Bend. The nose is an all-purpose tool, used not only for nudging rawhide bones between couch cushions, into a trough she has dug outside in the yard, or under my leg while I am involved in said revising, but also for smearing up my computer screen when she is, again, trying to get my attention.
Even as I write this, Sonya is probably wondering why I have two utterly redundant upper body appendages while she has four sturdy limbs to take her anywhere she wants to go.
Poor Mommy. No tail, a useless mouth, and such a tiny nose.