darkening
I doubt this is a good sign, but I may stand corrected. I have a ‘stain’ type darkening on one side of my glans, not very noticeable but it is more dark purple while the rest of the glans is reddish purple. It was not there before PE, got it using the MaXtender (which I do not recommend) and has been there ever since. It doesn’t seem to have affected anything, it’s just a visible side effect.
The reason I don’t think it is a good sign is that it corresponds to the ‘mark of strain’ on my glans when pulling it in a flaccid state. Trying to convert those words to something comprehensible, when squeezing the glans in a tight pull, the top around the hole is a little bunched up - on the side of the thumb it goes dark purple.