Why do some people order diet drink when they order a fattening meal?

Anonymous
There are some people who want to lose weight, which is good for them if they want to lose weight. What doesn't make sense though is to order a diet pepsi with a huge McDonald's meal. If you're serious about losing weight, why not order all healthy food and drinks? Especially since diet drink is usually worse for you anyway.
Why do some people order diet drink when they order a fattening meal?
18 Opinion