Researchers find a genetic basis for sexlessness. Key points One percent of the population has never had a sexual experience. Genes associated with intelligence are linked to sexlessness. Sexlessness was associated with less imbibing of alcohol, not smoking cigarettes, and not using cannabis. "Sex is like money; only too much is enough." –John Updike. That may be true generally, but not everyone is wealthy, and some people never have sex. One percent of the adult population h