I was a very late bloomer and did not sprout my first pubic hair until shortly after my 15th birthday (sophomore year of high school in the US), but then puberty hit with a vengeance. In a matter of months I went from peach fuzz and a little boy's body to a full bush of pubic hair, terrible acne, a whispy mustache, and a perpetual erection.
In junior high, I got the nickname "BD" - which was short for "Baby Dick" - assigned by the cruel "cool kid bullies." Of course that stuck with me petty much to graduation and consigned me to the class of losers, geeks, and perpetual victims that seems to always exist so that the cool kids can feel better about themselves.
At that time, I had just started seeing a new family practice doctor - a woman in her 40s. My male pediatrician had me in some bogus developmental study for late bloomers that turned out to be his own little pervy thing. Anyway, at that appointment I was both proud that I had FINALLY started to develop and terrified/embarrassed that I had finally started to develop. That was the first appointment when the doctor asked my mom to wait in the waiting room for the intimate part of the exam. I remember that the doctor talked about the changes and feelings that I could expect in the coming months, and that it was all natural and normal. Of course, I had a raging erection like I always did at the doctor - which, to me at the time, was no big deal. She talked to me about hormones, feelings, erections, masturbation, nocturnal emissions, safe sex, and all of the things that a boy without a father would need to know about puberty.