It sounds to me like he may have fronto temporal dementia.
The behavior variant. If so he can't help it, it's a known symptom of this terrible disease which changes a persons personality. They themselves are not aware that they are being inappropriate but their Carers ( usually their wife) will definitely know and feel like their marriage and life is over until they get a diagnosis and then everything falls into place.
A super-quick, easy dinner for Gdcs when you’ve all been out all day and they’re ‘starving’….



