No offence, but I find it pretty shocking that you've got to 46 and don't know how to cook and clean etc. Surely you know how to boil an egg? I was about eight when I learned how to do that. I still live with family and I do most of the washing and ironing and my brother who also lives at home is a better cook than my mum! (Not being mean, she'll tell you herself that he's better than she is).
Living at home is no excuse for not learning essential life skills. I wouldn't dream of expecting my mum to do everything for me and she wouldn't do it either. When your parents do everything for you then you have no incentive to ever leave. I already have itchy feet to move out but can't afford it at the moment.
No one should have to teach you this stuff. Cleaning is not hard, operating a washing machine is not hard, even cooking isn't that difficult really.
BiB - Me too!
TBH I think it's pretty appalling that someone's reached that age and can't do the basics like whipping a duster round the place or boiling an egg. At 46, Dave's parents can't exactly be in the first flush of youth either and they won't be around forever.
Come on Dave - it's never too late to start. Help your parents, remember what they've done for you and you can repay them with doing some housework, washing etc, or making them a nice meal. You'll surprise them, and yourself