@IClaudine
'Do they really fancy being a nurse maid and carer for their partner when they will still be relatively active and fit?'
This such a horrible, ableist (and ageist, plenty of people remain fit and heathy well into old age) thing to say. You do know disability can affect anyone of any age?
There are many people who are in relationships where one is a carer for the other. Are our relationships somehow lesser than relationships between non-disabled people?''
Give it a rest with the faux outrage...
I live with two long term health conditions that affect my daily life and I am also on the autism spectrum so I know perfectly well what living with a disability is like.
The point I was making has nothing to do with disability.
It was simply pointing out the obvious when it comes to age: someone who marries another person who is 20 years older than them or more is by definition going to be at a very different stage of their life when the other is reaching their twilight years and will likely need care.
Disability, illness can strike at any age and there is no predicting that. But you can grasp that with big age gaps there will inevitably be a big difference in term of stamina and health. A 55 year old and a 75 year old are in a completely different life stage for example.
I also noticed you failed to look at the impact that having much older parents has on children...