My intuition tells me the following:
Let's assume on top of my regular diet, I eat a cupcake and as a result of eating that cupcake I put on 50g of fat. Now lets let's assume instead of eating one of those cupcakes I ate two instead.
To me it does not follow that will mean I will put on 100g of fat instead of 50g. It seems too simplistic and probably not how the body works, although my friends adamantly argue that it will mean exactly that.
Similarly I believe that I would gain more weight from eating a pizza, if I ate it one slice per day on top of my regular diet, rather than if I binged out at one time and consumed it all in one night. Again I can't really defend this idea, it's just intuition.
Is my intuition correct? If so, why, and what evidence can I show my friends to prove my case?