And the UK security services are famous for literally grabbing you by the testicles and then asking a long series of questions, cf the Birmingham Six...
From a 1993 article in "The Independent" -
Gerry Hunter claimed that in the car taking them from Morecambe to Birmingham, Superintendent George Reade, who smelt of drink, punched and slapped him. Walker said that an officer called Kelly, also smelling of drink, head- butted him. Hill complained that a Sergeant Bennett whipped his testicles with the thong of his truncheon and that an Inspector Moore put a revolver into his mouth, 'said he was going to blow my fucking head off', pulled the trigger so that it clicked, then laughed. Hugh Callaghan said, 'I was in a state of shock. I do not know what I said. They said things to me. I agreed.'