For those going through ET now and those who have gone through ET w/their T and resolved the ET, do Ts understand how painful the ET is? Or should it be painful?

I don't want to write what my thoughts are, simply in order to avoid influencing others' opinions or responses. (I'm posting w/out my forum name, but have been a member for almost two years and will keep all information confidential to any outside person.) Anyone is welcome to PM me if that feels more comfortable.
Thanks for any insights or opinions people may have.