You were not alone in those adolescent adventures. My jr. high buddy and I would frequently play “boner tag” in his backyard pool while his dad was away, or before returning from work. No big deal, as we regularly saw each other mandatorily strapped and naked in PE class showers/locker room. One afternoon, my buddy’s older teen brother returned home from baseball practice early, unexpectedly, discovered us “boner swimming” and decided to join us. He quickly stripped out of his uniform and cup-jock, leaving everything on the deck chairs, joining our boner-grabbing Marco Polo water fun. Shortly after the pool water fun, we all three ended up on the deck where the big brother leaned back into a deck chair, stroking his impressive inches with a [challenging], “I bet you guys can’t do THIS [yet]!” Before big bro. could say the words, my buddy and I were instinctively beating our “sperm worms” furiously. Big bro. was first to spit his thick seed load all over his notably ripped chest and abs, then quickly grabbed his jockstrap to wipe down the fertile squirts. My buddy and I immediately shot our sperm loads, as I watched big bro. wipe his abs, while fantasizing getting a hold of that jock/cup unit assembly. Much to my surprise, and delight, he threw his freshly spooge-soaked strap at my chest, commanding, “Here, you little fuck wad, wipe up your spunk with this, don’t get our beach towels crusty!” This family was only 3 guys, including their Dad, as the mother had already divorced and remarried. Their Dad returned home soon after our “dick deck fun” without even blinking or otherwise reacting to our nudity or semi-boned cocks in his plain view… neither did his sons try to conceal our male delight. After a couple of overnight visits there, it was evident that Dad and his two teen sons had no problems around their home with nudity, jockstraps, occasional spontaneous boners, aware that each other knew how to wink with empathy, and “ take care of [male] business” when risen to the occasion. Their dad would sometimes swim with us, naked or jocked, of course, though I only [wet?] dreamed that he would/could one day jackoff with us on the pool deck (or anywhere). Their relaxed environment seemed pretty cool to me, as I had only two sisters, and my parents, at home. Though my dad was totally cool and encouraging to me, my buddy’s house seemed like a perfect place for lots of uninhibited “guy fun.” Quite notably, I enjoyed many years (probably decades) of masturbation fantasies simply recalling the fun and casual acceptance of “all things male” that were commonplace at this family of guys-only!