Living in a vacuum

Today is Jun chan's birthday so my mom made osekihan which is an extra sticky pink rice and azuki bean dish. She was tasting the finished product and had this to say:
You know, this dish calls for 10% beans to rice used, and every time it seems like such a small amount, I always add a little extra. But then, when it's finished, I guess there are a lot of beans and it probably would have been fine with that small amount.

So I suggested putting a note on her recipe to remind her next time that she should only use the 10% even if it seems too small. Here is what she said to that:
Oh, I remember every time. But it still seems small and so I still add more beans.

In incredulous tones I can't help but voice my disbelief: So you're saying that you know from previous experience that if you add more beans that it will be too many, but you do it anyway.

Her answer was, resoundingly: Yes.

It occurs to me that she is living in a logic vacuum. As in a real vacuum, it makes sense that a feather and a bowling ball will fall at the same rate of 9.81 meters per second. It also makes sense that what looks like too few beans will one day actually be too few beans.