It is really, but so is gaining. I'm sure for most of the population, you never notice you're gaining weight. Once you do it's 'oh i've put on a few pounds, no big deal'.. but then it keeps coming. Then one day you see a picture of yourself, or read the scale and say "holy crap, wtf happened to me'??? hopefull you catch it before it's too late.
I don't know when I noticed I had gained what I perceived as 'too much'. (I say perceived, as I was not unhealthy or even overweight for my build). I noticed a gradual gain, but I was ok with it. Then I tried on a bridesmaid dress. It was a teeny bit loose, but I don't like to be squeezed. It was in my closet for 3 months until the wedding. I tried it on a few weeks before the wedding and oh shit, it's verging on *tight*. It still fit, and I filled it out quite nicely. However, getting on the scale showed I had gained 5-10 pounds in 3 months.
At first I attributed the weight gain to a particular prescription I had started to help my IBS. It was known to increase food cravings and people gained weight from that. But I was on a super low dose. When I started watching calories, I noticed that no, I wasnt really craving things any more than I ever had. However, the drug, added with a vitamin supplement I needed to take as well, put my body in a better state than I could ever remember it being in. I could eat food and not worry. I didn't have to be afraid of every thing I ate. So I ate more, but I'm also fairly sedentary, so I gained.
That's my rational anyway. In about 2 months, I've lost close to 6 pounds. No, it's not much, but I still notice the difference. My waist started to feel thinner. I thought it was just my mind wanting the weight loss. I waited a few more weeks and got on the scale. Confirmed, I lost a bit of weight, like magic. It's satisfying for sure. I'm hoping to lose another 10 - 15 pounds, but we'll see how that goes.