Apple

What I want to eat, is a donut.

What I have in the fridge, is some donuts my awesome wife bought for me to eat.

What I'm eating is an apple.

Because it's good for me, it's high in fibre and I just had my gall bladder removed. Which limits what I can eat, at least for a few weeks while I recover. May be able to go back to eating everything I used to (with moderation). May have permanent heavy restrictions. Probably somewhere in the middle.

Or I can yolo and eat whatever I want - so long as I'm near a bathroom!