It would matter to me hugely. @Farrowandbrawl
Eating so much that you become unrecognisable as the person your partner chose to be with is to me a travesty of caring and loving behaviour. It's showing a complete lack of respect for your partner and ignoring what they find attractive. Or did- when they first met you.
First because when you sign up to someone for life (marriage) surely you find them physically and intellectually 'your type'?
Now we don't need go down the disability route- life changes out of their control- all v different.
For me it would show a loss of being on the same page with the same values. Regardless of sheer 'appearance'.
DH and I try very hard to keep fit, in order to be around as long as poss for the DCs, and each other.
Healthwise, it's the same as smoking or drinking. So it's irresponsible if nothing else.
We may still 'love' the person but fancying them is another matter.
I can't believe anyone thinks this doesn't matter and those that do are arguing for arguments' sake and simply being goady.