Hi There! I Was Hoping Someone Could Share Some Insight

Hi there! I was hoping someone could share some insight as to what this actually is on my penis shaft? My mind immediately went to STD. I am quite the hypochondriac, unfortunately. Overall, I am a healthy individual, in a relationship with my fiancee for the past 6 years, thus sexually active. First time I have something like this pop up. I also masturbate frequently, with no lotion or lube, not sure if this could be the cause. It does not itch, sting or cause any discomfort besides the fact that I can see it. I tried applying some antiseptic cream, only turned the former glossy pink color to a slightly darker tone. I appreciate all the help I can get. Thank you.