"It appears that some interaction with a male is required.
"However, why she does not utilise his sperm is at present unknown."
http://news.bbc.co.uk/earth/hi/earth_news/newsid_9139000/9139971.stm
-- "Hige sceal þe heardra, heorte þe cenre, mod sceal þe mare, þe ure mægen lytlað."