Butt inanimate objects (or women's butts) that resemble penises don't count, since they're not "frontal nudity." By the same token, a picture of a man with a dick head on top of his head can't be characterized as frontal nudity, either. Because he doesn't have his pants pulled down exposing his penis in a conventional manner. As well,
a dickhead is not a "penis," it's obviously just PART of a penis. And if your boss walks by and sees it at work, he'll assume the guy is just a dickhead.
For a case in point, scroll down...
"WTF are you staring at? Are you a fag or something?"
"Hehe, no, I'm not a fag."
"Then why do you keep staring at my dickhead like you want to lick it!?"
"OMG, dude! Are you for real? I'm trapped on an elevator with a guy who has a dickhead on his head, and you think it's inappropriate for me to stare at it? Seriously??"
"WTF do you think, fool? You act like you've never seen a dickhead before, WTF is wrong with you?"
"Oh, I've seen plenty of dickheads before, butt I've never seen a dickhead with a dickhead on top of his head!"
"Are you calling me a dickhead??"
"Huh? Are you trying to imply you're NOT a dickhead?"
"Fuck you!"
"Sorry dude, butt your dick is way too big for my butt hole."
"Wise ass...it's not a dick, it's just the freaking head of a dick. Don't you know the difference between a dickhead and a dick??"
"Okay dickhead, whatever. So how tall do you get when you see a hot chick?"
"Idiot, like I said, it's just a dickhead, and a dickhead can't become erect by itself."
"Well what happens when a pretty woman licks it?"
"What do you think happens? My dick gets hard, of course!"
"Oh, I get it...you've got a regular dick hanging between your legs. I thought maybe you'd been shortchanged in that department since you were endowed with such a big dickhead on your head."
"I can assure you, I definitely wasn't shortchanged down there."
"How big does it get when it's fully erect?"
"Bigger than yours."
"What makes you think that?"
"I can tell from the relatively small bulge in your tight pants."
"Butt a penis that's totally flaccid isn't a good indicator of the size it can get when it's fully erect. You want me to get it hard to prove my point?"
"Hell no!"
"Can I see your dick, then?"
"You want me to pull my penis out and show it to you??"
"Sure, we're alone in here, and there's no surveillance camera."
"I thought you said you're not a fag?"
"I don't have a gay bone in my body...I just want to compare both of your dickheads to see if they look the same."
"Well, I can save you the hassle, because they DO look the same."
"Oh, it's no hassle, I'd just like to see for myself. As it'd be interesting to compare a big dickhead with a little dickhead that's identical to it."
"Well, it'd be too much hassle for ME, because my dick is too big to pull out through my pants opening...I'd have to literally pull my pants down, in addition to my thermal underwear and boxers."
"No problem, I'll be happy to unbuckle your belt and pull all your clothes down for you."
"Butt I'd have to pull them back up myself in order to make everything fit comfortably...so forget about it, because it's not going to happen."
"Butt you have to go through all that hassle every time you take a piss, so what's the difference?"
"The difference is that I don't need to take a piss now."
"So you'd let me compare both your dickheads if we were in a restroom and you needed to piss?"
"Of course...why wouldn't I? You said you're not gay, and you already know what my little dickhead looks like from seeing my big dickhead."
"I was just wondering, that's all. How long do you think it'll be before you need to urinate again?"
"At least a couple of hours."
"Hmm, I can't wait that long. Hey, do you see that keyhole there in the phone compartment?"
"Yeah, what about it?"
"Even though the phone and alarm button isn't working today, the key would take us to the next floor and open the door."
"How do you know that?"
"Because I'm the elevator maintenance man and I've got the key. Butt my pants are so tight, I can't get my big hand in my pocket without unbuckling my belt and pulling my pants down...which is just too much hassle for me."