A watchman who indecently assaulted a mentally defective teenager claims he had a 'bizarre and abnormal' love affair with her. The 62-year-old took the 14-year-old girl to his rooftop home in To Kwa Wan where the offences took place, the District Court heard. He admitted four charges of indecent assault between September and November last year. Newman Wong, defending, said it was a case in which 'an old man let his sexual desire get out of control'. Mr Wong said the defendant's 'abnormal love affair' came after he stopped working at the girl's building. Prosecutor Denise Chan Fung-shan said he was arrested after the mother learned her daughter was followed to and from school by an elderly man who also hit her. Deputy Judge Ernest Lin Kam-hung adjourned sentencing until August 4.