My love of being nude outdoors and hopefully in front of other men probably stemmed a lot from what happened (or didn't ) in childhood, in my pre-teenage years and in adolescence. Of course, it depends on what you mean when you stay started flashing.' But that's a whole other issue.
One of my first 'flashing' or exhibitionist experiences was in the 3rd grade - age 8. I had a school friend whose house was far from mine (we rode a school bus). Sometimes, in order for us to play, our parents would allow me to ride home with him, and then either mine or his mother would bring me home. He had a real wooden 'playhouse' in his backyard - complete with furniture, windows/curtains, and he also lots of toys and also clothes (his mother's mostly) for playing 'dress up.' We'd strip naked and put on the old clothes. I have an image of me running around his yard with a thin chiffon blouse with nothing else but a hard-on underneath. NO... I did not (and do not) get
aroused by wearing female clothing - it was just the act of getting
naked to dress up (only partially clothed) that excited me. I vaguely remember us comparing stiff dicks but I don't think we really did anything with them - although I kind of have a faint memory of us doinng something with granulated sugar on our prepubescent woodies. My family moved every year during this period, so I didn't stay there long enough for things to develop further.
At about the age of 13 or so, - just about the time I discovered masturbation, I remember going out often after dark at 9-10 at night and then stripping off my clothes and sneaking around the neighborhood homes' backyards, garages, etc. One reason was the fact that I really did not have a place to jerk off. There were six people in the family and only one bathroom. While the basement was being turned into a third bedroom and family room, my brother and I had to sleep in the living room - just steps from my parents' room - so there was little privacy.
The basement floor of our house, whose back wall opened to the outside since the house was on a hill, so it was easy enough to go out without my parents knowing (and my brother was asleep). My mother was a nurse and often worked the 3-11 shift.
He asked me if I lived next door, pointing to my house. But I denied it, saying I lived on another street. I got up and grabbed my shorts and shirts, put them on hastily and got out of there. Later when I got back to my bed, the fear lessened, and reasoning kicked in, and then I realized how much it had turned me on to be discovered like that - naked and jerking.
Later I wondered what he was doing out alone at night and further from his house than I ventured. Probably he would have joined me in getting naked and jerking if I'd handled it differently.
I guess that these events might account for my continuing habit of getting naked in public whenever I could. Later as a teenager, I used to take long rides on my bicycle and eventually find a place to get
naked out in the country. Since it was broad daylight, I never really had the guts to risk getting caught - so I stayed pretty well sheltered from direct public view. But the excitement was always there because I could have been caught (or seen), and I never failed to cum quickly once I was completely naked.
One time a couple of summers ago, I got naked in a public park overlooking Tokyo Bay. I ended up being seen by a couple of curious male onlookers (casual strangers who were walking by and who seemed to 'know' that seeing sunbathers was common here).
Of course, I think I was the only sunbather who was actually nude. Well. one of the curious onlookers was a young Japanese guy who eventually got closer and closer and finally came up to me with his passions obviously enflamed by my daring. I was lying naked in the grass, and standing over me (clothed), he encouraged me to beat off to ejaculation right in front of him. It was a very hot experience and one that has kept me trying to 'repeat' it for a couple of years of dickflashing experiences since then.
I wrote about this in my latest JUB blog entry and also on my Guys Into CMNM (Clothed Male / Naked Male) blog.