2 weeks ago I had masturbated with fleshlight. I wash it properly on each use. But the last time I used had a slight stinky smell since my roomate has used that without washing it. So the last time I had masturbated with coconut oil for lubrication. Right after that, I saw my glans penis has hard brown skin or multiple skin. That skin is not much sensitive in the other region of the glans penis. I don't feel any itchiness or inflammation there. Is that any kind of STD or lesion or any other kind of skin condition for that do I need to worry about and look for treatment. Your suggestion will be quite helpful.