I was kinda expecting this answer.
Well, to make you happy some of my SPS don't have PE either during the day.
During the night hours though they all look like furry sticks.
I'm sure you have PE during the nightly hours?
I will look tonight but most of my sticks have some kind of polyps during the day. Even this one was pretty fussy during the day. At night would be even more fussy. Here is a better picture.

