Haha...

My mother says “不可以，pizza 会生水”
My brother says “怎么可能？只有母牛会生小牛，当然只有母水会生小水。Pizza 怎么会生小水？”
During this conversation, I was in the room watching TV...
Then after a while, I went into the kitchen and asked my brother “为什么cheese要蒸两次？”
Then my brother said “因为蒸第一次会生水”
Then I said “只有水会生水，cheese 怎么可能会生水呢？”
Then my brother said “我也是这样说，只有妈咪不相信，告诉我说pizza会生水”。