I just got back from skiing.
Here's my Crested Butte Condo.

Here's my friend with the Sudoku book I took.
The stupid puzzles drive me nutz.
He'd never seen Sudoku. He was immediately and intuitively very very skilled.

He's hooked.

I'm wondering though...
Will his wife hate me for distracting him....
...or will she thank me, as he may be so distracted as to quit bothering her.

;^)

BTW The name Sudoku is the Japanese abbreviation of a longer phrase,
"suuji wa dokushin ni kagiru" meaning "the digits must remain single".