It gets their attention. Humans do it too. We dress well, show off our physical features, whether it is women showing nice legs or men showing their muscles etc. It is a way that all sorts of creatures attract mates. Some creatures also use body parts to attract prey, as a way of getting their food. Camouflage is a bit like that too.
by eating other animals flesh.
bear
Webkinz animals do not have hearts on them. They have W's on there paws or other parts of the body.
Cats is but dogs amn't, because they are red.
A Zorgamosiolhr has three body parts
Because there are certain parts of the Animal that cost alot more than other parts.
Tigers, cows, pigs, sheep, foxes. A lot of animals are killed for their fur and/or meat ~ ~Sleenky
they have special parts on and in their body parts
a lot of reptiles have scales much like fish.
it connects to the heart to the other parts of the body ...
To get some views, to attract, to look sexier
Humans can live with body parts of other human being. Many matching tests has to be done for that. You need life long supervision by the specialist. Usually you have to take some drugs life long. You can not receive body parts from the animals. They are too much different. They will precipitate antigen antibody response. Animal body parts will not be accepted by your body.