i have two dogs, of the same breed, one is a boy and one is a girl. the boy is 2 years old but he acts like a grumpy old man. if he could shout 'GET OFF MY BED/COUCH/CHAIR YOU STINKING KIDS' he would... but he settles for evil glares instead. he is lazy and doesn't really like to be bothered.
the girl is about a year old and she couldn't be more of the opposite. she loves to be pet, played with, cuddled with. she trots around the house like 'yeah, i'm the shit and i know it!' and if you walk up to her she will roll onto her back so you can rub her belly.