mordant wit

Couples are turning to the laboratory to create "biojewellery" - bone rings grown from their DNA as a token of their love.

In an extreme test of devotion, they must submit to the removal of wisdom teeth and the extraction of a fragment of jawbone. A team has won ethical approval for the procedure, which is attracting commercial interest.
Tobie Kerridge, a British Royal College of Art research fellow and co-inventor of the idea, said it would cost about $11,700 to produce each ring.

Matthew Harrison, 25, who with his girlfriend, Harriet Harriss, 32, is to exchange rings, conceded that others might find it "disgusting".

But Mr Harrison, a product designer from London, said: "I see it as a set of biological connections instead of something like marriage, a legal connection." Ms Harriss described it as "incredibly poetic".