If you're a thinker, how do you respond/react when asked to express your feelings?

I’ve known some thinkers (people whose personality type was predominately thinker vs. feeler), who have had strong reactions when asked to express their feelings. Other thinkers I’ve known are more willing to share.

If you’re a thinker (your personality type leans more towards thinking than feeling), how guarded are you with your emotions? Do you react as if you’re threatened or offended when asked to share your feelings? If you’re open with sharing your emotions, was this something natural for you or did you undergo a process of becoming open and what was this process? What helps you to experience a level of comfort to not only be able to recognize your feelings, but also to experience comfort in sharing?

About me: My personality type leans more towards feeling. I make decisions based upon my feelings rather than my thoughts. However, I tend to be analytical and I enjoy processing my thoughts. I am quick to react emotionally, and unless I have learned from experience that a situation or person isn’t safe, I willingly share my emotional responses/reactions no matter how sentimental or colorful they are.