Plarail TOMY Thomas NEW RELEASES

As we know, the main thing about the new E233 Shonan Colour is that it has a special rear coupling, so the two trains can be connected:



To do that, you obviously need two trains, now, do you?

Hobby Search informs us about that, too: 

"If you have 2 sets of dedicated connection gimmicks on the tail car, you can connect [E233 series Shonan color] to each other."

That's why I'm puzzled by this limitation:

"This item is limited to 1 per household."

Per household? So not even my mother can buy me another one so I can have 2 and connect them?