Sean Penn Jealous of James Franco's Giant (Fake) Dick

James Franco took a little time out from making his weed face to talk to Jimmy Kimmel about how much Sean Penn dug Franco's donkey dong while they were filming the Gus Van Sant-directed Harvey Milk biopic Milk. Too bad Penn didn't know the frankfurter was a fakie. Franco explained to Kimmel (transcribed by Towleroad):

When I read the script, there was like, one kissing scene. No problem. It's acting....So, but as soon as I signed on I get a new script. Page five, like, full-on love scene. There's like three to five new love scenes in the movie. Gus! What's goin' on? And he said, well, Sean wants it. Sean asked for the love scene.

Sean's doin it. If he wants to do it, who am I to say no? So the first day of shooting I had to do this scene where everybody else is in clothes and I have to dive into the pool naked. And I was very uncomfortable but the make-up artist on the day handed me this prosthetic penis and said here, you can wear this. It'll make you more comfortable...The scene went on for a long time, like half the day. It's just getting old — diving into this pool naked. And I go over to Sean and I guess he didn't know I was wearing a prosthetic. And I said to Sean, 'You are such a great actor. You wouldn't do a scene like this if they asked . You wouldn't dive into the pool naked,' and he said, not knowing I was wearing a prosthetic he said, 'Well James, if I was built like you, I would.' I didn't say anything. Cut to a couple weeks later we did this scene. We're both dancing and we're both naked, and we both now had prosthetic penises. He finally put it together that I'm wearing the Boogie Nights prosthetic. And he said 'James that time in the pool!' And I said 'Yeah I was wearing the prosthetic.' And he said 'God, I'm so relieved.' And then, he's like 'You show me your prosthetic, I'll show you mine.'

We're kind of surprised that Penn wasn't able to spot the stand-in schlong immediately. We would have thought that he would have ample rubber ramrod experience after being married to Madonna.