Makes perfect sense to me, defend your home from intruders and get those teeth pearly white at the same time.
As if Japanese are concerned about oral hygiene! Ha!
In actuality, most younger people are concerned about their teeth, and braces are becoming more commonplace. However, the older generation have teeth like a train wreck, and the abundance of metallic dental work going into them look like the rails and railroad spikes at the accident site.
