Bad reasons to lose weight

Ok, so the title of this post might be a bit misleading. I believe that losing those extra pounds is never a bad thing, but sometimes people start working out for the wrong reasons. Fit Sugar has weighed in on what they think are bad reasons to go on a diet, and I have to say I agree. They are:

-Because celebrities do it
-Because you want to look good for an ex
-Because you have to lose weight for an event ... that's in the next couple of days (Two words: ain't happening!)
-Because you've been taken in by promises from a fad diet or quick fix
-Because someone who is not an expert says you should

What bad reasons have you lost weight for?