Me to myself Why don't they have the 'comment' thing on Tumblr apart from heart?

Me today TO THE WORLD WHY DOESN'T TUMBLR HAVE THE 'COMMENT' THING RIGHT ON POSTS!!!?

*I like heart, ask and chat, but commenting is something so direct and wonderful. Tumblr MUST have it, no?* (

Thoughts, please. (Sorry, I'm a newbie.)