Bikini bare: TV presenter Toyah Wilcox with the bikini condom, once used in America and now just one of the items on display at the History of Contraception Museum, which opened in London last week. Other rare and unusual exhibits include crocodile dung, weasels' testicles and bones, a wooden pessary, and lucky charms, such as mules' ear wax and a bone taken from the right side of a totally black cat.