That's not a dumb question at all.
A friend of mine skipped meals all the time, and she wound up gaining a lot of weight! She wasn't even eating that much. She went to the doctor, who told her that she had confused her own metabolism and made it slow down.
My thoughts are that if you skip a meal too often during the week, your metabolism probably does get confused, and you could end up gaining weight as a result--when that's the last thing you want.
I would say, have a piece of fruit, or something small, like you say, just to keep your metabolism going like it should.
Regards,
Sting66
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To eat or not to eat? 
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