TheRealTillyMinto - I am going to post my first comment on this thread again, in the hopes of educating you a bit about this subject - because it is not as simple as you and the OP are making it out to be. Please read this, and try to have an open mind - especially on the points about how difficult it is to exercise when you are heavy (strain on joints etc), the hormonal effects of fat, and the comments about self esteem.
"In an article in the Guardian this week, a researcher and nutrition coach called Kristin Dixon-Scott is quoted as saying that "fat is a metabolically active organ. It's not just storage, it actually secretes hormones that affect your energy levels". So in short "even if you don't really feel much pain, you just feel like crap."
This certainly jibes with how I feel - I am very overweight - nearly twice my ideal weight - and have struggled with my weight since my teenage years. I suspect part of the reason I have put on weight is because I was bullied as a teenager - strangely being overweight seems to make me invisible, and maybe that was subconsciously what I wanted.
Also, when you are carrying around a lot of excess weight, that is bloody knackering, as well as putting a lot of strain on your joints and back - and that makes exercise very difficult. It is easy to say, just take a 15-20 minute walk each day, but if I walk much past the end of our road, I get back ache. In the late spring, a friend and I did a 4 mile walk with our dogs (2 miles out, a rest at a cafe, and 2 miles back) and I could barely walk upstairs by the time I got home - and the next few days were agony.
Plus I have been struggling with depression since the bullying, though it was only diagnosed after I had the dses - and even then it was initally thought to be PND - it's only when it didn't go away that we looked deeper and a psychotherapist told me that it is not normal to be suicidal at 14 (as I was). Strange as it may sound, that was news to me.
I suffer from catastrophically low self esteem, and can honestly say that I don't like myself very much - and it is not easy to look after yourself if you don't like yourself - you are much less motivated to care for something you don't like. I have sometimes considered that I may be (subconsciously) committing suicide very slowly by not caring for my weight - who knows.
But the one thing I am not is stupid. I don't need the OP to tell me how to lose weight - but if they walked a mile in my shoes, in my skin, in my mind and emotions, they would not tell me glibly that it was so easy."