Got a boil in pubic region after unprotected sex. Is it STD?

Hi doctor,

I am a 23 year old male. My height is 5.41" and weight is 171.96 Ibs. I had a whitehead boil kind of thing in the pubic region for around three to four months. But, there was no pain on touching or pressing. Now very recently, I got four more similar things at the end of penis near the junction. They are also painless. I initially assumed it as a boil due to hair breaking, but now I am not sure. I pierced the initial boil that developed months back and from which some pus and two drops of blood came out. Rest four boils are also similar, but currently smaller in size. Kindly request you to tell what is it and how to cure. I had unprotected intercourse before a year, The first boil I observed was around five months later to that incident and the new four boils have come up just 10 days back. I used my friend's towel for bathing. He is a very unhygienic guy and he used to have unprotected sex a lot of times in a month with different partners. Is this STD? Please suggest treatment. Is it a boil or something? Since physical examination is not possible, I am attaching labeled photos. Kindly check the photos. Thank you.

Hi doctor,

Thank you for the reply.

Does this mean I most probably have STD?