Professor Lloyd has examined the current evolutionary theories and argues none adequately explain why females orgasm, as sexual climax is not needed for succesful conception in women, nor is it related to levels of fertility.
In contrast, males need to orgasm for successful reproduction. Lloyd argues that the female orgasm is only present due to the similar structure of early-stage embryos.
Male and female embryos share the nerve pathways necessary for orgasm, like they share the tissue structure for nipples, despite them being reproductively useful in only one half of adults.
Other theories, she claims, have been unduly influenced by ideas about what is sexually ‘normal’ or ‘appropriate’.
On a bit of a tangent, All in the Mind now produces its programmes as podcasts as well as Realaudio streams, allowing them to be downloaded for later listening.