Why am I losing weight?

Hi, so I've always been slender, I have an athletic body type and and I've always loved the way I looked. Guys are always saying I have a great body and I was perfectly happy. Some days I think I should start a workout plan, but I'm too lazy. And anyway, this is my last summer before college, and all I've been doing Is goofing off, being lazy and what not. Eating quite a lot. And I've lost ten pounds in the last month or so. I don't know why! I was 106 before about a month ago and then two weeks ago I was 101 and now I'm 97! I really don't look much different, but it still kind of freaks me out. If any of you have any idea why this might be happening please share. :))
Why am I losing weight?
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