Eric,
I’m not a medical man,so these are only my observations.
I have had these for many years now. I think they consist of Sebum which is a waste product of the skin. There seems to be no known solvent (that can be used on the body). But as a waste product that the body cannot remove it tends to have an effect on the skin. More noticeable on middle age people’s chests, where it can be seen as many white spots under the skin and causes the skin to wrinkle. I had this on my chest and found that scrubbing with a massage mitt gets rid of them on the chest by removing the skin that holds them (the skin looks much better when they are removed but it takes time as it has to allow other skin to develop under them. The spots on the scrotum are rather larger than elswhere on the body so they would be more difficult to remove anyway. I haven’t tried this on my scrotum as I’ve just decided to put up with them
Occasionally one does get very sore and I have to dig them out, which is very difficult as they are well set in, but a lot of care is necessey and some antiseptic must be applied to stop the wound getting septic..
Perhaps it’s better to make a joke about it - “I keep it as a record of each time I’ve had sex” - Then giggle and bury your face in her chest!
Incidentally sunlight has no effect! I’ve been on nudist holidays and all they do is show whiter - and you can easily see who has them and who doesn’t and there are a lot that do do (alright, so I’m a voyeur!)
Sorry I can’t be more help than that
Ken