Besides reinforcing the headphones' powerful sub-bass reproduction capability, the ear pads deliver a supportive, wrap-around feel, ideal for long-term wearing comfort.

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Apparently they figured sub-zero nighttime temperatures and treacherous road conditions are ideal for showing off the stability management technology in their 911, Panamera and Cayenne variants.

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The upshot, according to Brian Williams of the World Health Organisation, is that if, in some ideal world, every sexually active man in sub-Saharan Africa were circumcised, 2m new infections would be avoided over the course of ten years, and 300, 000 deaths prevented.

ECONOMIST: The XVIIth International AIDS Conference