A study at the University of Sydney in Australia found that the smaller a dog is, the more likely he is to be aggressive, wild, noisy, and obsessed with humping things.
And the researchers actually compared it to the Napoleon complex in short men . . . where they overcompensate for their height by being angrier and more aggressive.
It's true across all breeds of dogs . . . so the smallest Great Dane is more likely to hump your leg than the biggest Great Dane, and the smallest teacup poodle is more likely to hump your leg than the biggest teacup poodle.
(Sydney Morning Herald)