Bethan, 56, lives in southern England on the same street as best friend Allie, 64.

They are on their first holiday to Kenya, a country they say is "just full of big young boys who like us older girls."

Hard figures are difficult to come by, but local people on the coast estimate that as many as one in five single women visiting from rich countries are in search of sex.

...The white beaches of the Indian Ocean coast stretched before the friends as they both walked arm-in-arm with young African men, Allie resting her white haired-head on the shoulder of her companion, a six-foot-four 23-year-old from the Maasai tribe.

He wore new sunglasses he said were a gift from her.

"We both get something we want -- where's the negative?" Allie asked in a bar later, nursing a strong, golden cocktail.

She was still wearing her bikini top, having just pulled on a pair of jeans and a necklace of traditional African beads.

Bethan sipped the same local drink: a powerful mix of honey, fresh limes and vodka known locally as "Dawa," or "medicine."

She kept one eye on her date -- a 20-year-old playing pool, a red bandana tying back dreadlocks and new-looking sports shoes on his feet.

He looked up and came to join her at the table, kissing her, then collecting more coins for the pool game...