What is the difference between signing "my" and "my heart"?
The sign for "my" uses a flat palm placed flat against the center of your chest. "My heart" uses an open hand with the middle finger bent inward, touching the left side of your chest directly over your heart.
Why is the middle finger bent in this sign?
In ASL, the open hand with a bent middle finger is frequently used as a base handshape for signs related to emotions, feelings, and internal physical states, such as "feel", "sick", or "pity".
Can I use this sign to talk about the physical organ?
Yes, this sign can be used to refer to the physical heart organ, such as when discussing a heartbeat or a medical condition, as well as the metaphorical heart related to love and emotions.