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Sean Penn plays San Francisco’s first openly gay politician, Harvey Milk, in Gus Van Sant‘s new film, "Milk."

James Franco plays his longtime lover/partner Scott Smith.

Franco tells Out Magazine that the first person Sean Penn told about his first man kiss (with Franco) was not his wife, Robin Wright-Penn. Nor was it Petra Nemcova.

MadonnaseanpennIt was his ex-wife, Madonna.

"After the first kiss, it broke the ice. And then after our kiss Sean texted Madonna — his ex-wife, Madonna — and said, “I just broke my cherry kissing a guy. I thought of you. I don’t know why.” And then she wrote back and said, “Congratulations.”

Weird. (Unless you’re a star and have an indie profile movie to promote.)

Can you imagine getting a text message from your ex-husband telling you he just kissed guy and thought of you?

At one point during rehearsals, it was suggested that Franco and Sean Penn spend the night together in an apartment to "feel comfortable" with each other, Franco told Out.

To find out how that went, keep reading. You know you gotta.

]]>Franco: “At one point during rehearsals, the idea was thrown out that Sean and I would go to the apartment that we eventually shot in and spend a night or two there just to, like — I don’t know what — feel comfortable with each other? That idea was kind of thrown out but ended up not happening because of scheduling. I approached the relationship part as I would approach any relationship. When I’m working with another actor or actress that I’m supposed to have a relationship with, I’ll look for things in the person I like. My other hero on the film was Sean, so it wasn’t too hard to look up to him — or whatever that is.

Out: You fell in love with Sean? Is that what you’re saying?

Franco: Basically, I’ve been in love with him since even before "Fast Times." He did this little thing called "The Beaver Trilogy." … So, basically I’ve been in love with Sean Penn since "The Beaver Trilogy."

Photos: Top, Robin Wright-Penn and Sean Penn in Toronto this month. Below, Madonna and Sean Penn in happier days.

Credit: WireImage