It is often difficult to answer the question: How do you feel? It is daunting really to pin point exactly what it is that you feel at that moment.
Sometimes is because the feeling is complex, would require an explanation.
Sometimes we are just so not used to talk about our feelings that we are lost for words. Other times we are so scared to reveal what we feel, we get lost in trying to translate our sensations into something acceptable.
The reason good therapists always ask you about how you feel, it is not to torture you in one of the ways described above, but uniquely because emotion matters.