This report describes the technique of body mapping - a crucial innovation for anyone working with women (and possibly men?), on issues of reproductive health, health generally and sex education. The article begins with a description of the author's observation that traditional concepts and language about the body were being used to communicate contraceptive methods. Body mapping was developed from there. In the case study presented the technique was used to bridge the gap between western and traditional knowledge, though importantly, not to replace western knowledge with traditional knowledge. Method is described in detail. There is an important behaviour and attitudes point - that for trainers and community workers to take people's own ideas about their bodies seriously, requires a major shift in attitudes about traditional vs "western" knowledge.