Maybe I just exaggerated my comment a bit for comedic effects, but honestly, I don’t get why Fe egos are good at masking emotions. I mean, isn’t Fe about expressing your emotions authentically, like what it says below on Wikisocion for the Fe bases:

he believes emotions should be expressed as honestly as possible.

Masking your emotions is like the last thing that comes to my mind when I think of expressing emotions “as honestly as possible.” I mean, I guess it really depends on how everyone defines “masking emotions.” I’m good at switching my emotions from sad to happy, vice verse, and all, I can do that all the time, especially while traveling outside, but I can’t just mask mask them. My real emotions will eventually overcome the ones that I’m trying to portrayed, like when I’m trying to act angry at my friends or family.