All there is to know about sex

So you think you know quite a bit about sex. We'll bet you don't. And you'll realise it if you visit the Science Museum's exhibition, Sex: Bridging The Circle Of Life.

In a show that mixes video with models and a few real creatures - though their sexual excitement, sadly, is long over - you will find out much more about sex than you ever realised there was to know.

However, you won't learn much more about the human variety than you tend to find out through, shall we say, trial and error. The section on 'how do they do it' definitely concerns 'they' rather than 'we', with most of the references to humans being confined to new technologies such as cloning.

The notable exception to this is a remarkably candid video showing how men with a certain inflation problem can be fitted with a pump, but more of that later.

Perhaps keeping humans out of it was an effort to cut down the titter potential, but there is still plenty of opportunity for that, for instance with the real specimens of penises ranging from the horse's large member to the remarkably small orang-utan's.

Indeed, one suspects the Australian Museum which produced this travelling exhibition has deliberately met the sniggerers head-on, telling us, for example, that male brown marsupial mice have only one chance to mate, and 'race around' for two weeks in early spring impregnating as many females as possible before they 'burn out' and die, leaving the meagre winter food to the mums-to-be.