It sounds like just another profile on a dating website.

"I'm into religion, science and politics. Soccer, table tennis and swimming. Spending time with family," it starts.

But these are not your normal call-outs for a life partner.

"I have one wife and three children. My wife also greatly supports this lifestyle and is wanting a co-wife to be a part of our family," it continues.

The profile is just one of thousands on a match-making website for Muslim men and women looking for a second spouse. And it is rapidly gaining traction in Australia, its British founder says.

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