Im really interested in this. Do any of you exercise? I like to exercise first thing and I suppose my worry is that I'll exercise and then I can only have black coffee until lunchtime which doesn't seem quite right. I have to work 9-5 so I can't really exercise much later (although it's possible I guess as I'm now working at home)
I don't do 16-8 for any particular reason, nor do I watch my weight specifically, however I do often only eat after 6pm, particularly when I'm fit - the less fit I am, the more likely I am to eat earlier in the day.
When commuting, I would generally do 45minute cycle to the office, a lunch run 7-12km and 45 minute cycle home, not eating anything until 6-7pm. Only with really intense exercise for a long period would I need the calories sooner - which is reasonable, when fit you have a lot of ready fuel for exercise and it takes a lot of intensity to exhaust them.
When unfit though, a smaller amount of exercise has me reaching for food earlier in the day, this is also expected, less fit means less fuel stored and more of it used rather than the masses of longer term fuel you have.
So if you need food after your exercise really depends on how fit you are, just try it - you certainly don't need to eat before exercise, although it may well impact your sensations when exercising - you might feel you can't as hard etc.