Note that the Japanese don't take those adolescent boys examples seriously, seeing it as innocent, "boys will be boys" behavior. Sexualized depictions, however... Still, this trope makes their mandated censorship of genitals of any age in hentai look quite silly.
Goku and Gohan's penises were censored out of Dragon Ball for American TV broadcasts.
The Uncut Dragon BallDVDs get PG-13 certificates and they show simply-drawn penises on young boys from time to time. Goku's inability to understand the concepts of modesty or manners was a Running Gag in the first series for a while.
The boys in Doraemon have this happen to them lots of times. Lots.
The same with Zatch from Zatch Bell!. He loves to run around naked all over the place, and swims in the nude.
The Littl' Bits censored some full frontal body shots in the two-part episode "The Sea".
A strange occurence can be seen in classic Bastard!!, where Dark Schneider has absolutely no qualms about getting naked, sometimes using his "equipment" as a lasso to constrain girls he wants to...um...well, you know. It's sometimes referred to as "The Hand of the Devil".
In the 2nd episode of High School D×D, there's a single shot frame of Issei, while trying to cover up Rias, has his nether region shown uncensored.
Notably, there are also plenty of Raging Stiffie jokes (some of which did make it into the anime), but the penis in question is always covered at the time. Apparently exposed penises and erect penises are both funny, but an exposed, erect penis is obscene.
In Richard Corben's Den comics, originally presented in the comic Heavy Metal, the title character is thrown into the fantasy world of Neverwhere where he and other humans from Earth become physical ideals and buck naked and most of the stories never hide it. However, that world is a place where nudity taboos don't exist since Den and his girlfriend, Cath, find that they are completely comfortable naked and meet others who are clothed to varying degrees and no one considers their nudity as anything remarkable.
Only applies to the first two volumes, though — later ones have more clothes and occasionally make use of Censor Shadow and Scenery Censor.
Lampshaded and parodied in the animated Heavy Metal movie, where he puts on a Loin Cloth, saying that he doesn't want to walk around with his "dork hanging out".
Dr. Manhattan in Watchmen. There was a lot of controversy about this. That there is a giant flopping blue wang is all many non-fans know about the film adaptation, in fact.
In the comic book, however, it was intentionally drawn with very low amounts of detail and wasn't particularly big, as to avoid Best Known for the Fanservice.
Supreme Power was the first Marvel comic to feature both male and female full-frontal nudity (though the former appeared in only one panel).
Unless you wanted to count comics from Marvel's old Epic line. Elektra Lives Again provides rather... unique views of some established Marvel characters.
Another Brian K. Vaughan comic, Saga, does the same thing.
The Sin City comics are loaded with fanservice so much so that even the guys get in on it. Every major male character gets at least one full frontal nude scene... except for Marv.
Also the 300 comic. Spartans love their cloaks, but love to feel the wind on their franks and beans more.
German comic artist Brösel is really fond of drawing penises. Many of the longer story arcs in Werner include people losing their clothes somewhere along the way. This is almost never sexy.
In Fables the first issue that introduces the male and female dryads have a full frontal scene for both of them. It's about as titillating as the Dr. Manhattan scenes from Watchmen.
Groo The Wanderer engages in this from time to time, usually from infant or prepubescent boys running around without pants in impoverished areas. Given Sergio's cartoonish art style, these are totally lacking any detail and are easily overlooked.
In the first issue of Sex Criminals, Jon is seen completely naked in profile. It's not frontal, but his entire penis is clearly visible.
Battlestar Galactica: The Plan features a now-infamous "cock-shot" where the camera purposefully zooms in on a penis. According to an interview with Katee Sackhoff, Edward James Olmos (director of the movie) insisted that the camera "zoom in on the cock" and even directed actors to not cover it up for the shot.
Come Undone, a LGBT film, is a example of european relaxness with nudity, not only features frontal nudity from both needs, but it has... more
Scandinavians tend to view nudity as something natural, and thus the children's movie Ronja the Robber's Daughter includes a scene where eleven completely nude men are forced outside in the snow to clean themselves during winter. And that's actual snow the actors are running around in.
Tom Hardy for about half of Bronson. And then he did it again for the short film Sergeant Slaughter, My Big Brother.
Background characters of both genders are seen fully nude in Prospero's Books, Peter Greenaway's adaptation of The Tempest.
Ever wondered if Daniel Craig was a natural blonde? The answer can be found in Love is the Devil. He is.
In Beyond Re-Animator, there's an extended fight sequence between a rat and a zombie penis.
A man's testicles are shown being graphically crushed in the unrated version of Carver.
Pretty much every film Peter Greenaway has ever directed.
In Hostel 2 due to complaints from female viewers of too much female nudity in the first movie, Eli Roth made sure the first frontal nude shot is with a man. Also the scene with the dog near the end of the movie will make of tons of male viewers clutch their privates in fear.
Christopher Eccleston has never been shy about onscreen nudity (working as an artist's model during your 20s will have that effect), but it took him until Lennon Naked to do a movie in which the director wasn't taking measures that his dick wouldn't be visible during these scenes. (It's not a sexual scene, though. He and Naoko Mori are replicating the album cover mentioned below.)
A lot of male characters in Pier Paolo Pasolini's "Trilogy of Life" (The Decameron, The Canterbury Tales and Arabian Nights) and in Salo, or the 120 Days of Sodom (although it's Fan Disservice in the last film).
Oz is the grand master of this trope among mainstream shows.
Channel Five's notorious one-off game show Naked Jungle was just that... a jungle adventure game where all the contestants and the presenter were nude, with no censorship.
HBO documentary "Private Dicks", you can guess what is about includes the above mentioned Jonah Falcon.
Queer as Folk often has male nudity and occasional frontal nudity, rarely from any main character.
Rome gives us Mark Antony (in clear view), Brutus (seen from the side) and Pullo (though it's rather dark). Plus the poor slave who was sent as a gift to Servilia because "a large penis is always welcome" (though apparently he was enhanced digitally in post production).
And lets not forget the Squick when Vorenus drops the huge, mummified phallos from his moneybag - apparently a war memento taken from a fallen enemy.
HBO's John Adams Episode 1 of this miniseries features the main character's cousin Samuel tarring and feathering a Tory. While the soldier was naked. Boiling tar. Ouch! Flashes of the man's front bits can be seen.
Not to mentioned the "blowjob incident" with Mayor Royce at the beginning of season four.
True Blood, in a grand HBO tradition, also features some during Marianne's orgies in Season 2. Considering it was some old guest star dude, it was a clear Fan Disservice.
Although when Detective Andy Bellefleur breaks up another orgy, quick-eyed viewers will note a couple naked extra that are quite a biteasieron the eyes.
In the season 6 finale, Eric enjoys a spot of nude sunbathing after drinking Warlow's blood, which has made him immune to sunlight. Unfortunately, the blood's effects wear off and the fanservice turns to Fan Disserviceas he starts to burn up.
Lucky Louie, an HBO comedy, eschewed female nudity (erotic, therefore not funny) but often featured male nudity as show creator Louie C.K. considered the nude male form funny-looking. Louie himself bolts out of bed naked just after sex in the second episode. Other occurrences are always Played for Laughs.
Boardwalk Empire has Vincent Piazza as Lucky Luciano doing full-frontal after getting it on with Gillian Darmody, who he thinks is Jimmy's wife, not his mother.
Olyvar, a spy and prostitute in the employ of Littlefinger, who poses as a squire and seduces Loras Tyrell in season 3 and has a threeway with Prince Oberyn Martell and his paramour Ellaria in season 4.
As punishment for attempting to sell poisoned wine to Daenerys, the Dothraki force a merchant to march with them naked and tied to a horse, where he would ultimately die of exhaustion or be dragged to death.
Even Hodor (!), while bathing in hot springs. Osha notes her approval.
John Lennon and Yoko Ono's album "Two Virgins" shows them both naked on the cover.
Yoshiki's "NUDE" photobook is a subversion. Japan in the 1990s required at least token censorship. The result is a sheet and often Lens Flare or a similar overexposure effect to conceal his penis in any frontal poses.
The Dutch comic "Fokke & Sukke" (Yes, I know what it sounds like) has two naked birds as the main characters. With their penises showing all the time, and sometimes they are even part of the joke. Did I mention this comic shows up daily in newspapers? Of course for most bird species this counts as Artistic License - Biology.
What, you're surprised an industry could last two hundred years and not have an example or two? In WWE alone there was Spanky streaking on Smackdown, followed by an interview on WWE Confidential where Josh Matthews asked if he "felt a breeze". Spanky responded "No, I have small genitals."
The all male Davinci Body Series workout videos have each of the participants including the instructor performing in the nude.
Alan Strang in Equus is one of the few roles in theatre (male or female) to require on-stage nudity.
When Daniel Radcliffe starred in Equus, there were a million billion jokes about Harry Potter showing his "wand".
Prior Walter, the main protagonist of Angels In America strips down completely on-stage during an examination scene. The scene is maintained in the HBO miniseries. Joe Pitt also strips in a different scene, though the miniseries only showed a rear view.
Ian McKellen's recent run as King Lear had him going nude as a part of Lear's madness. Eyewitness accounts range from "well-endowed" to "old and floppy"
Hair notoriously strips the majority of the cast, male and female, briefly at the end of Act I.
Oh! Calcutta! was the second show on Broadway to feature male full frontal nudity (in 1971. It opened in the West End in 1970). However, for some reason (most likely because there was a lot more nudity than in Hair) it's far more notorious.
"Take Me Out," in which members of a baseball team react to a teammate's coming out as gay, takes place in the locker room showers. The set includes actual working showers and an all-male, all-naked cast.
The werewolf in Rondo of Blood (and every other game that uses the same sprites) turns into a naked, anatomically correct human when it dies (it's a small sprite, but there's definitely something there). Eventually censored in The Dracula X Chronicles (with black briefs, both in 2D and 3D) and Castlevania: Order of Ecclesia (with magically-appearing boxer shorts).
Castlevania: Symphony of the Night has naked statues of both men and women. The most notable male statues are the stone guardians on either side of each of the "warp doors" which transport you somewhere else in the castle.
The characters in Rampage (Two Guys and a Girl) have always turned into naked humans when they die, but only in Rampage: World Tour did you get a completely unobstructed shot of their naked bodies. This being a higher bittage than the Castlevania example above, the penis is clearly defined.
In Outlast, two of the reoccurring enemies are a pair of deformed, insane cannibals. They are clearly naked, which makes being attacked them even more unsettling.
In the Whistleblower prequel at one point you get strapped down to a saw table by an insane asylum member intent on making you his... wife. You're treated to a view of your own penis in the most horrifying of circumstances.
God of War: Chains of Olympus: The Cyclops monster was originally supposed to have a penis, but was redesigned. You can actually see the old design in a showcase room unlocked after you beat the game.
In Dreamweb, when you enter David Crane's bedroom you find in the middle of sex. His penis is clearly visible before he covers it with a pillow (and after you shoot him, the pillow falls off again).
One of the sketches for Niels shows most of the cast dancing in their underwear. Turns out Peter doesn't wear any.
During the story arc in Questionable Content where Marten, Marigold, and Hannelore travel to the space station where Hanners grew up, when the space plane's AI fully manifests, he does so without pants. This is the first time that genitals have been depicted in the comic, which up to that point has had a lot of sexual content but no bared breasts or genitals.
Most of the guys in Passing Time get naked at one point or another.
The very NSFW Oglaf due to being pornographic humor has full male, full female and everything in between.
Kazas Mate Gwenna - Kaza has no problem with going around nude in the Jungle. He and his wife prefer it that way. And eventually the artist starts showing both of them full frontal occasionally.
Incubus Tales frequently features male nudity of all kinds, sexual and non-sexual. The author has stated that part of his approach to male nudity, and nudity in general, is due to the conflation between nudity, sensuality, and sexuality and the double-standard that exists between violence and nudity, especially male nudity.
The Only Half Saga as should be expected from a violent vampire webcomic, features an array of nudity and sexuality, including very occasional male full frontal.
Bart Simpson in The Simpsons Movie. The film got only a PG-13 rating for numerous reasons. One, the penis did not have much detail, the latter of which lessens most films' impacts of certain scenes. Two, it was done in a non-sexual manner. Three, it was shown onscreen for all of two seconds before it was covered by another shrub.
In some cuts of the movie the particular scene has a big tag reading "EUROPEAN VERSION ONLY" over Bart's crotch. Not a bad compromise.
There's an episode that features the actual David statue coming to Springfield. And it's uncensored.
In South Park, Cartman's naked penis was far more important than the fact that they threw a shuriken into Butters' eye.
And in a meta-example, later airings would actually blur the penis out, while scenes of Butters are left intact.
All over the place in the third season of The Venture Bros., where most of it counted as Fan Disservice. Case in point: young Rusty Venture getting an eyeful of his dad's penis hanging out the front of his trousers in a flashback, which traumatized the boy for life.
The first season of The Boondocks contains lots of male nudity, but only the DVD version has Full Frontal male nudity uncensored.
The creator of Brazilian comic Monica's Gang said in an interview that while exporting the animated adaptations, he had problems in some Muslim countries with one of the characters, hillbilly Chuck Billy (Chico Bento), who swims naked. The interviewer replied that the upcry was too much for such a small penis. Besides, Chuck Bully is a kid. Only a creepy pedophile would be "offended" by a little boy's penis.
In an episode of Bob And Margaret, Bob has a nightmare where he is naked and falling. We get the 'upskirt' view (sans skirt).
The "Hot Chick" episode of Superjail! features a sequence where the Warden has stripped off all of his clothing, to the horror of Jared and confusion of Alice. While the TV airing obscured his crotch area with a censor bar, the uncensored DVD version shows that they actually drew in and animated his genitalia.