What makes food so sensual, and meals often integral to romance? This is a question asked by Diane Ackerman in her wonderful book A Natural History of the Senses (Vintage Books), which I came across while writing my novel Love Apples. The answer, she says, is that, whereas humans can enjoy the other senses in solitude, they seldom choose to dine alone because taste has such a “powerful social component”. She points out that in certain traditional African cultures “exchanging food makes a…..