An American joke.
Man retired and went to the social security office to apply for social security. The woman at the desk asked to see his drivers licence as proof of identity. He realised He had forgotten it at home and told the woman he would have to go home to get it and come back. She told him to open his shirt shirt and when she saw his chest was covered in Gray hair she said that was proof enough for her and she processsed his claim.
When he went home he told his wife what had happened.
She said he should have dropped his trousers. He might have ve been entitled to disability as well.