Penis expert Adam Devine evaluates Zac Efron's. With some examples.

In Neighbors, 2014, Zac Efron plays a fraternity dude who butt heads with neighbor Seth Rogan. The Workaholics guys had a cameo as fratboys from an earlier generation, so Zac and Seth responded by applying for jobs on their show.

Zac wooes Adam by giving him a lap dance, and then whipping it out.  "Holy God, it's amazing!" he exclaims.  He's an expert on dicks, but he's never seen anything like it. "Did Leonardo da Vinci sculpt that? It's beautiful."

Of course, the guy with the biggest dick gets the job.

Adam didn't actually get to see Zac's dick that day, but he did in 2015, when they starred as hapless brothers in Mike and Dave Need Wedding Dates.

"It's a very handsome dick," he tells us, "It's just as veiny as his arms." 

Later -- yes, he's asked about it a lot -- he said "It's as thick as his arm, and veiny!"

The guys were in the midst of a hot-and-heavy bromance that lasted until 2021, when Adam married Chloe Bridges.  So doubtless he's seen it many times since.

But we haven't.

Zac has appeared semi-nude several times in movies and on tv.  We've seen his butt.  We see his physique from the waist up all the time.  But he keeps the beneath-the-belt stuff reserved for girlfriends and bromantic partners.

Penis after the break

The closest we've come are underwear shots that show nothing.

And a long-distance hand-over-dick malfunction.

But we can get an idea from Adam's descriptions.

1. Circumcized.

2. As thick as his arm.  No dick is that big -- Adam was just overwhelmed by homoerotic desire.  But some come close.

3. Veiny. Not a turn-on for me, but Adam is entitled to his preferences.

See also: Who has a tighter butthole, Adam or Nick?

Nude photos of Zac Efron

Mike and Dave need Wedding Dates: Bulges and biceps, but where's the plot?