I'm overweight. 5"6 and 14st. I eat the same as I always have. In fact, I eat less now. I exercise the same as I always have. It never decreased.
I was never above a size 10 and 9.5st so I was lovely and slim with no effort......
And then I had children and quit smoking. The pounds piled on almost overnight without me noticing. My body was unable to maintain my low weight.
I've dieted a thousand times, done 3 mile walks at 6am numerous times a week and nothing. Zip. Zilch. Still fat.
I'd sometimes lose a stone at the start of a hard diet and then it would stop completely. No more weight-loss unless I dropped calories significantly more. Then it would stop again and unless I lived on an apple a day I wouldn't lose a single ounce for months on end.
Only certain people can lose weight by skipping or reducing meals. Some bodies go into starvation mode where it stores everything and slows its metabolism. Some people can stuff their faces every day (ah the good old days) and never gain an ounce.
Some people love exercising. To them it's enjoyable. To me it's like sticking needles in my eyes. I cannot imagine anything less fun than being hot, sweaty, out of breath with burning muscles and being completely exhausted. With the added bonus of not being able to move the following day. I still do it though and having nothing to show for it is seriously demoralising.
We're all different and DH has stopped mentioning my weight since I pointed out I am eating the exact same things as him but smaller portions (plus, he eats loads of biscuits whereas I don't) and doing slightly more exercise than him. He's scrawny naturally.