With Americans, it's bottoms, bottoms, bottoms. 'Get your ass out of the sling'; 'Let's get our asses into gear here, guys'; 'Okay, dudes, let's go kick ass', and so on. They need a euphemism. If every time they mentioned asses a Goatse (pronounced 'goat-see' and if you don't know what that is DO NOT GOOGLE IT because - really - you will be sorry) sprang to the American mind, they'd soon change their ways. Which would be a shame, particularly when it comes to the full, metaphorico-anatomically explicit version: not the ass but the asshole.