Regarding eating out on Sundays. Only if one must do it would it be acceptable.
After Mass, Im hungry. Therefore, I must eat or I'll starve. It's that simple. I want to be able to make it home and be able to come back NEXT Sunday in order to fulfill my weekly obligation.
Hietanen, would you prevent someone from feeding the hungry (which is btw a corporal work of mercy)?
No, to help others (spiritually ans bodily), is always a work that is licit and acceptable, as I pointed out on the post.
The sick need to be tented, the hungry need to be feed.
Now, as I said, if you HAVE to eat out, because of necessity because of your (acceptable) work on a Sunday, for example, it would be licit. Another example, as you pointed out, is if you starve.
But I don't think you'll starve, as your excuse was, that is just ridiculous. Restaurants weren't even open on Sundays in many Countries and towns before the Vatican II revolution. People then managed to survive, and the rules of fasting before mass back then was much more strict than today.