Nintendo UK has kicked off a social media campaign for the 3DS by asking you a simple question: what is your reason for owning a Nintendo 3DS? The company launched a YouTube video, which you can see above, profiling the extensive list of titles that are currently on the portable handheld, as well as upcoming exclusives. And in a bid to chug away on the 3DS hype train, Nintendo UK has created a hashtag for fans to add their #3DSreasons over Twitter. But with such an exciting list of titles coming to the 3DS in the future, does the handheld need such an advertisement? In the meantime, what are your #3DSreasons? Let us know your thoughts in the comment section below.