A Conundrum

First off: is the plural of 'paradox' simply 'paradoxes', or 'paradoci'?  (Or is a paradox better than one dox, and already plural?)

Ok, here's the conundrum, and it's a serious issue.  From a lot of what I've read, in order to avoid unnecessary weight gain, the nutrition gurus advise to only eat when you're hungry.

Now, obviously in modern communal or family living, when one person cooks for a whole group, for the sake of efficiency, the whole group ought to eat together, even if they're not all simultaneously hungry.  So what to do?

There are lots of possible solutions, depending on the micro-culture of the group: is it OK to leave the cooked food on the counter, for each person to eat when they're ready?  Who's going to wash up? And so on.

I had several other conundrums lined up, but now I've forgotten ...