Nagging huh. We get it from our Mothers and then, when old enough, we think it's over, yet it is not ....
The first thing you need to do is reject that word, nagging. It's actually called "helping".
i'm settling down to watch football all day and i've brought all the good stuff, wings, cookies, popcorn, Mountain Dew, chips
How can you eat, popcorn, then chips, then cookies topped with mountain dew, starting with wings. The average person is going to grap chips or popcorn, only.
Whether you run 4 miles a day or 20 miles a day, all you are doing is convincing yourself that, that (small) run, will get rid of all the calories that you just put into your body, let alone, fat. Like a trade huh.
A bit like an alcoholic. I'll only drink one bottle and then I will drink a glass of water, trade off. Try seeing if that same alcoholic could go for one day without having a drink.
See if you can go one "week" without eating any junk food what so ever.. If you can't would you consider you have a problem? And, that perhaps she is right, if she doesn't slow it down now, you will become addicted to junk food (comfort food), and consequently, your body will crave for even more food as it is, such as second plates and you will be a ball of fat. You won't be able to run 4 miles, let alone get off the couch fast, or walk for too long, or study, because you will want to sleep...
Just try a one week's test and then sit back and think about whether or not, maybe you are in-deed putting too much food into your body and alot of it junk and the above scenario will happen so you want to actually kind of slow that down.
Why not also google obese and get a jist of what you could turn out like?
Sometimes words mean nothing but reality means everything.