for me, it's willpower!
Like for example "if i am 30 and only now i start to lose weight, then I have to carry those weights and maybe some extra through over those 10 years since 20 something years old"? **** No! I absolutely won't allow it~
So yes, it's easier to do in 20-something lol.
Besides, all the reasons above me also are same as what I thought as well
