Members of a small women’s rights group, Liverpool ReSisters, have declared that “women don’t have penises.” They seem to be very confident of this point, having gone as far as to paste stickers claiming as much onto the genital areas of some of the statues that make up Anthony Gormley’s artwork Another Place on Crosby Beach near Liverpool. It’s an attention-grabbing stunt. But are they right? Well, it depends on what they mean by “women.”