OK, here's four:
The not so satisfying one first. I was out with a group of friends in the summer a few years back, and there was a new guy I didn't know very well (didn't really know him at all). We were sitting on the ground at a park, we were all in shorts, and I got a clear view that he was freeballing. I didn't really like him, and I knew he was straight, and he wasn't that special to look at, so it was kind of a show for nothing. About half a year later this guy got busted for sexually abusing a very young girl (under ten) who he was babysitting, so it ends up there's nothing appealing about the memory at all!
The others are better, though. The first time i ever tried seriously to do this was in college. I was at a summer party right after i graduated that there was a guy who was going to be a sophomore. he was slender and sexy and tremendously hot, to everyone, I think. I ended up sort of sitting with my elbows further and further down my knees trying to see up his shorts and boxers, and I did finally catch a glimpse of hair and a nut. I don't know if he figured it out, i don't think he did. it would have been uncomfortable, between us. This was a guy who got tons of sex from girls (he's all settled down, sobered up, and rich these days).
The third one: I was at a pagan festival, a bit camping thing, where it was not unusual for people to walk around naked, although often is twasn't the people you'd want to see naked doing it. Anyway, this woman I was acquainted with was towing around this boy toy, he was very hot, long hair, lean, and he knew he was hot (I'm talking the sort of hot where he really really knows he's hot). This one particular evening, he's wearing a kilt and no shirt, and while his sugarmama is off doing something, he's sitting around the campfire with some of us guys. I'm the only gay one there. He's across from me and got his legs spread, so I just take advantage of the view and stare and his goods (which go with the rest of his hot, arrogant body). He catches on, leers at me, and spreads his legs so I get a better view. I take advantage of this until sugarmama came back and told him he was giving everyone a show and to close his legs. never did like her.
probably the most dramatic one was that I was sittiing by myself in a local italian restaurant. it's not a fancy place but it was close to where i worked and they knew me there. It was early afternoon, after the lunch rush, and one of the only other occupied tables is over in the smoking section where there's this college age guy and college age girl sitting across from each other. He's smoking (a cigarette), and he's sort of flaming out just a little, and this attracts my attention. This is the early '90's, and he's got kind of a grungy look brown curly hair, and maybe a little olive tone to his complexion. He's cute. After a while, he notices that I'm watching him, and suddenly he spreads his knees wide. I can see that the crotch of his jeans is completely ripped out. I don't remember that I really saw his goods, although I have the impression that I saw pubes. After a bit, he got up and went back to the bathroom. Eventually -- when he came back in -- I figured out that he had intended for me to follow him back. I was just way too clueless to get it. I have always wondered what exactly would have happened if i had, but like i said they knew me at this restaurant and i wouldn't have wanted to get a reputation for sex in their bathroom.
....I found this pic in NC72134's excellent gallery:
http://www.justusboys.com/forum/view.php?photos=368&id=200968&title=legs1-jpg&sortorder=&sortby=0