US President Donald Trump’s hands, notably small in size, have often hogged the limelight in his meetings with foreign dignitaries. First, there was the 19-second scrimmage with Shinzo Abe during which Trump kept vigorously tugging the Japanese premier’s unsuspecting extremity, causing him evident discomfort. Then came the joust with Justin Trudeau, which the Canadian leader had reportedly come prepared for, yet barely managed to survive. The president’s incorrigible limbs were even more conspicuous in their refusal to cooperate during the tete-a-tete with Angela Merkel: despite prodding, Trump did not shake the German chancellor’s hands.