oh i love it when they make jokes about their age. this one is quite in the vein of derek nimmo on forbidden fruit.

Nicholas Parsons: 53 seconds on "how to be irresistible to the opposite sex," Clement, starting now.

Clement Freud: Keeping one’s trousers on at my sort of age is a very good way of being irresistible to the opposite sex. 'Else they might expect what they will not get.