And I think I'm doing it to cover them up, but I'm realizing now that it's a very fine line between chivalry and, you know, workplace sexual assault." "For HBO, we have so much license to show black people loving and f--king. We don't get to see black lust in a normalized and natural way that isn't hyper-sexualized," she tells . Sometimes it's good sex, sometimes it's bad sex, sometimes it's revenge sex. It's such a privilege to show that and it feels so real.

The writer in me is always excited to write those scenes. Why the f--k did I write this because I got to do it?

"In real life sex is messy, and we wanted to get at that wonderful messiness." . All you're doing is smacking your nuts against someone, and nothing is going in...[One time,] a girl had to be on top of me, she had spectacular breasts, and I hadn't rearranged my stuff into a harmless position. My male co-stars, at the end of the day, don't care...

Even so, the idea of appearing nude or semi-nude—and engaging in a personal act—is scary for a lot of stars.

For some actors, like Luke Evans, a little liquor helps to take the edge off.

"Filming a sex scene is not a sensual or pleasurable environment. "And I forget every line in the scene—not just from this movie but from every other movie I've done.

I take my hands away and I look down at my hands and there's two frickin' smiley faces on them and I have no idea what to do. And I reflexively, like an idiot, just put my hands right back on her breasts.

I think he said something to the effect of, 'I apologize if I get aroused and I apologize if I do not get aroused.' And you have to say it with the accent if you do it," he tells NBC Bay Area.

"But there is sort of always this awkward state of, 'Is this OK? ' And then in between, it's like, just, 'Let's act like nothing happened.' And then you see how good of an actor you really are." of working with Jamie Dornan. And on top of that, my hands and legs were tied, and I was blindfolded, and I was being hit with this bizarre tool." "In the scene, she's sitting there and I take her top off and the bra off, and she has those pasties on, but she's drawn these adorable little smiley faces on them," he says of co-star Olivia Wilde during an appearance on .

You are alone with a man who's not your husband—who also has a husband—he's in his underwear, you're in your underwear, and you're sort of dry humping on a bed.

No one there's there, so then we think, 'OK, we should be professional about this.

So I called my mom, and I was like, 'Will you just tell me it's OK? That was the most vulnerable I've ever been." "I just start by apologizing.

I think somebody told me—and I'm not sure who the actor was; I think it was Sir Laurence Olivier who said it...

No, not acceptable." "I try to be sensitive to the fact that we're doing something intimate, but also keep a clear boundary. It's confusing." of his onscreen romp with Kristen Wiig's character. "Because I get a lot of crap for having done nudes scenes and sex scenes. '" "It's always pretty awkward when you have to take off your pants in front of the crew and other actors and all that stuff. You don't feel uncomfortable whilst the cameras are rolling," he tells E! "As soon as it's 'cut,' and you're standing around and you're in your underwear, chatting to the crew, that's when it's weird and uncomfortable." of the limited series' seventh episode.