I'm assuming the parent was referring to something more similar to like when you need to go to the bathroom. Overall the urge is there, but on an hourly basis i

I'm assuming the parent was referring to something more similar to like when you need to go to the bathroom. Overall the urge is there, but on an hourly basis it comes and goes. If you don't go to the bathroom and hold it in, after an hour you'll probably forget about it, and then it'll come back a few hours after that. This has been my experience with fasting where I'll get really hunger, then my body will get over it, then a few hours later I'm hungry again. Seems like it's your body going through cycles of burning fat stores or something. Like oh you're not going to eat? Better start burning a bit of fat to tide us over, then that energy runs out and that's when hunger strikes again until your body goes through another breakdown cycle.