Tom and Anna are both 60 years old and have been married for 40 years. 

One day they go for a walk and all of a sudden a good fairy stands in front of them and says, “You’ve been married for so long and you’re so cute together, I’ll grant you a wish each.”

The woman is beside herself with joy and wishes for a trip to Thailand. Poof – she’s holding two tickets to Thailand and a five star hotel voucher for two.
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The man says, “Wow, that’s one chance in a lifetime! I’m sorry, darling, but I wish I had a wife that’s 30 years younger than me.”
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“Are you sure?” asks the fairy. 
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“Yes!” replies Tom without hesitation.
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Poof once more – and he’s 90.