That he has no heart.
The Lion wanted courage, and the Tin Man wanted a heart.
In the Wizard of Oz, the Tin Man was looking for 'a heart'. He eventually received a heart from the Wizard in the end of the movie. The heart was actually a clock of some sort, because it was heard to be ticking.
The tin man teaches Dorothy the importance of love (the romantic heart).
He felt that having a heart made him a real man as opposed to someone who was just made of tin.
The tin man wanted a heart. The lion wanted courage. The scarecrow wanted brains. Dorothy wanted to go home.
It was a heart.
The Tinman wanted a heart .
He wanted a heart
the tin man
He wants a heart
Tin Man