Fascinated by his wisdom teeth, which he had removed years ago, the actor/writer asked his dentist's assistant if he could take them home. When she agreed, he requested other people's extracted molars and incisors and built up quite a collection, which he placed in a large bowl on his coffee table.

But when he moved in with Aniston, she made it clear the teeth trove had to go.

However, not all his odd collections related to his fascination with dentistry has been relegated to storage or the trash - Theroux kept his haul of "dental mannequins".

"I'm obsessed," Theroux explains. "They're meant for dentists who basically practice on them."

The actor showed off the metal head which kickstarted his odd collection during an appearance on pal Jimmy Kimmel's U.S. chat show on Thursday (16Oct15).