Why can celebrity couples never stand the test of time?

Broadcasting legend'''Fred Dinenage    Picture: Malcolm Wells (141209-0357) PPP-140425-154506001

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Oh dear, what has happened to Hollywood’s hottest couple?

Are the rumours really true about Demi Moore and Ashton Kutcher? Photos of Kutcher have emerged showing him partying with some college chicks and now there are allegations of infidelity.

If it’s correct, will Demi forgive him? He is only a youngster compared to her, but that’s no excuse.

Rumours are rife that this power couple, who defied the critics and proved that a big age gap wasn’t an issue, that you really could get along as one big happy family (including her ex Bruce Willis, which I’ve always found rather weird), could soon be splitting.

I’d be gutted. Why can celebrity couples never seem to stand the test of time?