Copyranter doesn’t understand why, in a new Australian ad campaign, Subway would liken sandwich bread to abs — “Because Australia has a large population of cannibals, I guess, whose stomachs won’t churn at the thought of sandwiches stuffed with human entrails?” We wonder how they’d feel about the Chickpea logo boldly on display at the brand spankin’ new store on Houston Street, near Eldridge. It’s cool and all, butt…