… as shown in today’s Doodle, because:

1. I don’t have a hammock.
2. Although I have a lot of trees, I don’t have two that are suitable for stringing a hammock between.
3. It’s raining.

(And yes, as is fairly obvious, I doodled this on the computer rather than on paper. My artistic skills aren’t any better with a mouse, alas. That’s supposed to be a book lying on the hammock, in case you were wondering.)