(4) Low libido with no ED => Does that happen???
It takes libido to be erect, in a manner of speaking, except for when you're sleeping.
I was suffering a depressive state for a couple of years. I did wake during the night "up", but it never happened awake. Or, if it did, it went away pronto. And, I turned to the "porn" thing for a while just to have SOME kind of hope. It's pretty self defeating, though.
Got ride of the medication that had the side effect of depression, and things have been slowly getting better ever since.