In the last 25 years, urologist Mels van Driel has seen - by his own admission - "tens of thousands of penises and testicles". (One would assume he has seen somewhere in the region of twice as many testicles as penises, of course). With that in mind, there can be few people better qualified to write authoritatively about penises (and, quite frequently, penis size) from a medical, psychological and cultural-historical perspective.

In his new book, Manhood: The Rise and Fall of the Penis, van Driel answers a range of fascinating questions about the male member. For example, why does alcohol increase a woman's sexual desire but reduce a man's ability to perform? Why is sperm sticky? Why was it acceptable to display your penis in public in ancient Greece? And what on earth is computer sex all about?

If you're looking for an all-encompassing read about the penis (and penis size) - and how attitudes are incredibly different around the world - this book is definitely for you. And the good news is that it is written with real humour and finesse throughout.

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