What is the most affectionate animal?

Some of these want you constantly; some decide once a week that you exist. Both count as affection, depending on who you ask.

1

Dog

Greets the same person the same way every single day for a decade.

2

Cat

Head-butts, kneads and picks the one lap in the room it has decided about.

3

Bonobo

Settles almost every social problem with contact rather than conflict.

4

Rat

Seeks out hands, grooms fingers and laughs ultrasonically when tickled.

5

Guinea Pig

Whistles the moment it hears the fridge and settles instantly once held.

6

Parrot

Bonds so hard with one person that it resents everyone else in the house.

7

Dolphin

Approaches, plays and stays close without needing anything in return.

8

Pig

Leans against a leg for a belly rub with the confidence of a dog.

9

Rabbit

Flops over beside a trusted person, which is as loud as a rabbit gets.

10

Goat

Follows people around the field and headbutts for attention.

11

Cow

Grooms its favourites, forms lasting friendships and sulks when separated.

12

Sugar Glider

Bonds to a person's scent and rides around in a pocket.