I eat the banana with peel still on
Why would you eat a banana with the peel still intact?
Because I'm poor, and I hate wasting food
It's healthy to eat bananas, and it's wise that you want to avoid wasting food and money.  However, your body cannot digest the banana peel, so it serves no nutritional purpose for you.  Maybe you could use it for compost, or put it in a garden recycling bin.
I'm eating it now
Well in the future, you should find another use for the banana peel. I wouldn't want you to get sick from it and like I said there are other ways to use it.