A beginner's guide to sex.
Launer
John
J
London Department of Postgraduate Medical Education, Stewart House, London, UK. jlauner@londondeanery.ac.uk
D000818:Animals; D005075:Biological Evolution; D002755:Choice Behavior; D005260:Female; D006801:Humans; D008297:Male; D012098:Reproduction / Q000502:physiology; D012723:Sex; D012725:Sexual Behavior