It is said that Irogenia of Lys could finish a man with nothing but her eyes

"It is said that Irogenia of Lys could finish a man with nothing but her eyes" is a phrase from Game of Thrones, spoken by Roxanne McKee as Doreah.

Context
Doreah: No, khaleesi. You must look in [Drogo's] eyes, always. Love comes in at the eyes. It is said that Irogenia of Lys could finish a man with nothing but her eyes.

Daenerys Targaryen: Finish a man?

[Doreah gives Daenerys a suggestive look]

Daenerys Targaryen: Oh.

Doreah: Kings traveled across the world for a night with Irogenia [of Lys]. Magisters sold their palaces. Khals burned her enemies just to have her for a few hours. They say a thousand men propsed to her, and she refused them all.

Daenerys Targaryen: She sounds like an interesting woman. I... I don't think that Drogo will like [having sex] with me on top.

Doreah: You will make him like it, khaleesi. Men want what they've never had. The Dothraki take slaves like a hound takes a bitch. Are you a slave, khaleesi?

[Daenerys shakes her head]

Doreah: Then don't make love like a slave.

Trivia

 * The use of the word "finish" in this conversation is censorship for ejaculation, indicated by the look Doreah gives Daenerys.
 * Daenerys is unsure if Drogo will be pleased with the woman-on-top position, because he seems to prefer anal sex; however, when they later have sex with Daenerys on top, Drogo is more than pleased.