Getting a reluctant child to give an elderly relative a kiss often requires some gentle persuasion. But parents who force their sons and daughters to give granny a peck on the cheek may be doing them harm, it was claimed yesterday. For instead of helping a child learn about showing affection, it may blur the boundaries of what is acceptable when it comes to physical contact, according to Lucy Emmerson, coordinator of the Sex Education Forum. She even claims that encouraging a youngster to blow a kiss, high-five or wave to a relative instead will help them avoid future sexual...