'Cause you know sometimes words have two meanings… or more.
I was IMing one of my girlfriends and when I said something, she typed back “I’m down.” I went into sympathetic mode and asked what’s got her down. She answered it’s down with a positive meaning, like yo homie I be down wid dat. I said how many meanings does this word have? I was thinking of the Beatles and I quoted “You tell lies thinking I can’t see / You don’t cry 'cause you’re laughing at me / I’m down.”
Think of smacking a pillow against the wall until it bursts and the room is filled with drifting light fluffy feathers. That’s a fairly good metaphor for my state of consciousness. “I’m down.”