Now a new study based out of the Japan Monkey Centre is trying to figure out what's behind the strange romance. SEE ALSO: Family of stolen mini monkeys recovering after harrowing zoo heist ...

Here's a closer look at how Honda's Grom and Monkey miniature motorcycles compare. Read more: 12 Major Motorcycle Brands Ranked Worst To Best We'll begin with the Honda Grom, as it is the cheaper ...