"I don't think there is a recipe, but I think you have to be fortunate and get the right one the first time round," Mrs Pound said.
"And well, I'm good looking," Mr Pound said, before reflecting that his wife was "more tolerant than me".
A former Metropolitan Police mechanic in London, Mr Pound was offered the chance to move to New Zealand to work in the forestry industry in the 1950s.
They both agreed to return home if they didn't take to the new country - but have never looked back.
"I've never been homesick in my life," Mrs Pound said.
This Labour Day weekend will mark 50 years since they moved to Rotorua, and both are quick to sing the praises of their adopted hometown.
"You are away from Auckland and the rat race, you are near the coast and the climate isn't too bad," Mr Pound said.
With their energy and light-hearted nature, the Pounds seem to be a couple who have lived life to the fullest, and without regret. Both are keen ten-pin bowlers, a fact proved by the trophies that compete for space on their conservatory shelf.
They have travelled all over the country, and as far as Australia, with the Tenpin Rotovegas club.
A 70-year love affair also makes for some good anecdotes.
As well as their unorthodox teenage meeting atop the haystack - "a few of us would go down the street and jump around on it" - Mrs Pound recalled an unfortunate detour taken trying to exit a football stadium.
"He walked me into the men's toilets at the West Ham football ground ... it was a lot harder to get out than it was to get in," Mrs Pound laughed.
The Pounds speak lovingly of their two daughters, Carolyn and Christine, and their "three wonderful grandchildren".
Carolyn said she and her sister thought they had "the best parents in the world".
"They are still looking after me and I'm in my 50s," she said.
Yesterday, as the couple sat with their arms around each other, Mr Pound joked about commemorating their Blue Sapphire anniversary with a photo in the paper.
"If we get any closer, we'll have to get married."