According to google, "People who wear their heart on their sleeve express their emotions freely and openly, for all to see. Those who wear their heart on their sleeve do not hold back their emotions, for good or for bad. It is clear how they feel in each moment."
You're pretty spot on here google, (for once). I am sensitive, a romantic and very emotional at times. Adversely, If you're a piece of crap to me, particularly a passive aggressive one- I'll let you know it. I will openly fawn over and profess my love, or give you a back the fuck up look and sass. I held back on releasing some fury on someone today... but my sleeve was pounding.