I was doing this after a binge followed by a 60 minute all-out guilt-ridden elliptical session and it was all liquid which pissed me off. I don't want to do it inside where my sister will hear it, so I did it outside on my patio. I figured I might as well do all the purging I can outside my apartment while I'm here since it's "normal" to puke at my apartment complex since it's full of drunk 18 year old idiots having their first beer away from mommy.
Members around here, and bulimics/bulimia "experts" in general, always seem to rationalize the weight gain or lack of a weight loss by bingeing and purging by saying "your body already takes in the calories so it doesn't matter what you puke up". This is 100% false. I hate reading it but I also don't want to individually call anyone out in a thread. Calories are in your food, yes. Your body digests food, yes. By digesting the food, your body is taking in the calories the food is made up of, yes. However, it's not like you eat food, the calories are magically sucked into your body, and empty "food leftovers" are left in your stomach that can be purged. Calories are digested in the body as the food is digested in the body. For example, let's say you eat a cheeseburger. That cheeseburger moves to your stomach for digestion. It doesn't sit in your stomach FOREVER. It's eventually digested and cleared completely. As your body is "clearing" this cheeseburger, THAT is when it is separating the different macronutrients and calories and transporting them to other parts of the body for functioning, fuel, storage, etc.
HERE IS THE BOTTOM LINE WHEN IT COMES TO BINGEING AND PURGING -- AND WHETHER OR NOT IT AFFECTS YOUR WEIGHT:
If you eat more than you puke out, you're in a positive caloric intake. Obviously, example, you eat 1000 calories but only puke out 500 calories -- you're still at +500 calories. Let's say you binge on 1000 calories and you puke 1000 calories -- brings you up and back down to 0 calories in the end. Some bulimics, such as the couple I see in this thread, lose weight because they are throwing up enough of their food to leave them with a favorable overall intake for the day. The bulimics who gain weight or stay at the same weight simply don't have a favorable ratio of food-in and food-out. The bulimics gaining weight are probably having a HUGE binge followed by a purge that doesn't remove anywhere near as many calories.