I am up for it! - You're doing something because you're either watching too mu

You're doing something because you're either watching too much TV, thinking about impossible situations, or you're daydreaming about your crush.

I'm up for it! I've been watching all day and I'm tired.

I'm up for it! I'm thinking about my crush and I can't stop.

I'm up for it! I'm thinking about a time machine and how it won't happen.