Capybara
The capybara has achieved something that has eluded humanity since the dawn of civilisation: universal social acceptance. Footage from zoological institutions worldwide reveals creatures of every species - from monkeys to pelicans to house cats - voluntarily choosing to rest upon or alongside these magnificent rodents. The capybara's inherent approachability stems from its complete absence of threatening behaviour, territorial aggression, or indeed any discernible ambition whatsoever. Scientists theorise that the capybara emits a calming frequency that transcends species boundaries. One cannot simply ride a capybara to a social gathering, but the capybara is the social gathering.
Motorcycle
The motorcycle presents a more complicated social proposition. Whilst certain subcultural groups venerate the two-wheeled machine as a symbol of freedom and rebellion, the broader populace often responds with a mixture of noise complaints and insurance premium anxiety. The motorcycle rider must contend with the reality that their chosen transport announces their arrival from approximately three streets away, a feature which does not endear them to sleeping neighbours or nervous pedestrians. Furthermore, the motorcycle cannot be introduced to other vehicles in the hope they might become friends. It simply is not done.