asexual reproduction.
The central paradox of Linton's writing was her inability, or unwillingness, to imagine an asexual friendship between women.
Many asexual people experience attraction, but feel no need to act out that attraction sexually. Because they don't see a lack of sexual arousal as a problem to be corrected, asexual people focus their energy on enjoying other types of arousal and pleasure.
Indeed, if sex has so many advantages, then which special adaptations - if any - allow long-term survival without it? However, the main task of the research teams dealing with such putative ancient asexuals has thus far been to demonstrate that their respective groups (mainly bdelloids, darwinulids and certain lineages within orbatid mites) indeed merit the status.