When you click through it says "To ensure we match the genitals to a specific caver please include your caving helmet and the latest copy of Descent in the photo, apart from D.P whose specific piercings we will immediately recognise"
I can't wait to see what those mischievous Mendip cave lawyers come up with next. 40 years of hassling the rest of the community with inane waffle, though I suppose if they weren't all doing that they end up clogging up other regions that have caves!