I Am Always In The Mood. I Am In For Everything

Riddle: I am always in the mood. I am in for everything, or anything. I can be in a happy mood but I have no soul. It's easy for people to spell things out with me, because I'm smart, but it's impossible without me. What am I?

Answer: I am letters.

Source: https://www.riddles.com/index.php/2466

I am always in the mood. I am in for everything, or anything. I can be in a happy mood but I have no soul. It's <a href="/easy-riddles">easy</a> for people to spell things out with me, because I'm smart, but it's impossible without me. What am I? — I am always in the mood. I am in for everything by Riddlemaster555 v1.

Riddle: I am always in the mood. I am in for everything, or anything. I can be in a happy mood but I have no soul. It's <a href="/easy-riddles">easy</a> for people to spell things out with me, because I'm smart, but it's impossible without me. What am I? Answer: I am letters. — by Riddlemaster555 v2.