McDonalds unhealthy?

I just ate a double-quarter pounder with a coke (number 3) from McD’s and I don’t understand everyone’s complaints that fast-food is increasing the obesity percentage of our nation’s population. That burger went through me faster than a speeding bullet, leaving no time for weight gain. Now I feel great, satisfied, and with a little cleaning up to do. Binging and purging doesn’t have to go in one end and out the same.