"Not for now..."

Reuben asks me if I want any biscuits.
"Yeah, go on," I said, "I like the butter crunch."
"We finished the butter crunch!"
"How come? I only had one!"
"Out of the whole packet? No..."

This is the thing. I can't eat lots of biscuits (or anything) at once. I have to take my time. Reuben is the opposite. He also doesn't understand the phrase, "Not for now." When asked if I want another biscuit and I answer, "Not for now", this obviously means that I don't want another now but may have one later. He thinks it means I don't want another ever and gives him free reign to eat all of the packet.

So now I'm munching shortbread, kind of annoyed that I only got to eat one biscuit out of the packet I picked out and bought myself...