The Metropolitan policeman who spent a week crawling the London Marathon wearing a gorilla costume captured my imagination and my admiration. When he crossed the finish line and beat his chest, I silently cheered. Tom Harrison, who goes by 'Mr Gorilla', swapped between crawling on his hands and knees and on his hands and feet to save his blistered knees. He raised some $50,000 for the Gorilla Organisation, which protects gorillas. It can’t have been fun. He earned every penny. I rarely feel that way about people who ask me to sponsor them for runs, walks, hikes, cycle races, and climbs. Why should I contribute to a charity not of my choosing so people can do something that they enjoy, or want to be incentivised to do? Why should I give so they can achieve an ambition, or get super fit? Why should I give because someone has grown a moustache? It seems churlish to object to charity sponsorship, but maybe it’s gone too far.