Anyway, this next portion is a little tutorial on grapefruit and its related utensils.
First of all, this is a grapefruit:

And this is what it looks like when it's cut open:

As you can see, it is a citrus fruit, similar to an orange or a lemon. The little triangular-ish sections are where the juicy tasty goodness is. Now this is the important part, so listen up--in order to efficiently remove said juicy goodness from the bitter skin, you use one of these:

This is a grapefruit spoon. The little serrated edges on the tip cut into the grapefruit and help you to scoop out the good parts, like so:

If you have never had a grapefruit, I recommend you go get one (and a grapefruit spoon) and eat it. If you can't figure out how to eat one, give me a call and I would be happy to split one with you and give the full walkthrough. However, you will need to bring your own spoon. I don't have one.