Brad Pitt and Angelina JolieThe last thing we ever thought we'd see is a snap of Angelina Jolie's butt on Twitter.

Sadly, it's not her butt we can view in all its glory.

It's Demi Moore's.

Remember when Demi's somewhat indiscreet husband, Ashton Kutcher, posted a revealing pic of his wife online a few months ago?

Well Brad Pitt's got something to say about it.

He told US Wired magazine: "Don't take a picture of your wife's butt. That's silly.

"Take pictures of other people's wives' butts," he jokes.

It seems Brad's not too keen on this whole digital age thing that's going on.

When it comes to internet dating he warns: "Everyone lies online. In fact, readers expect you to lie.

"If you don't, they'll think you make less (money) than you actually do. So the only way to tell the truth is to lie."

Right, that's nice and clear then.

And by the way, don't think even about calling up Brad's mobile when he's on the loo.

"No, you can't talk on the phone." Brad said indignantly. "Do you want the guy next to you to hear your entire conversation?"

In fact, he'd much rather you texted him.

"Just be sure you don't hit the wrong button and end up putting a photo of your junk on Twitter," he says. "Trust me, you don't want those followers."

Glad that's all sorted then. Oh, but Brad, you forgot to give us your number..

You can see Ashton's cheeky snap - plus a few more celebrity Twitter-witterers - in the gallery below.

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