Hello, I recently noticed that when my penis is somewhat erect and I masturbate, these dots appear on my penis head and dots scatter on the line between the top of my head, and where PPP is usually located. I think its from masturbation, but I've uploaded 3 pictures that were taken roughly ten minutes after masturbating and then 3 more about an hour after. I am sexually active, but I had a blood and urine test done very recently and they said it came out negative. I was wondering what the two dots were on my penis head as well? There is no discomfort, or any other irregularities elsewhere. And they aren't very visible when my penis is flaccid, there's nothing else abnormal.
The bottom three are taken after masturbation.