Jack took a break

Jack took a break from his agency. He deaded with profits from his agency, to go and buy his Japan-crazed friend something. He found a shop called Japanese Antiques and he dropped in. He looked in and he saw a ninja custom, all-black, the way you’d expect a classic ninja to look. The price tag, though, was exorbinat. £959? Jack went and asked the cashier.

“Excuse me, but why is this costume so expensive?” he asked.

The cashier was blank and he went to find his manager.

The manager, Billy Mac Billy, looked over the costume, failing to recognise Jack, and he said:

“This costume was worn by actual ninjas. It dates back to the 1500s. The ninja who used this always wore it on his mission.”

Jack, unimpressed, said “No he didn’t. This costume isn’t real!”

Why?