Xander lets Buffy do the talking

Dawn comes back down the stairs after a minute or two, her clothes now back in place and her face clean. "She's fast," muses Xander, silently.

Buffy looks crossly at her younger sister. "Sit down, Dawn."

Dawn sits, looking very worried.

Buffy starts to pace in front of the television. "Has Xander been showing you this movie?" Dawn starts to sputter out a denial, but Buffy interrupts her. "Don't lie to me. I know what's going on here."

"She looks really cross," thinks Xander, "Maybe I should step in..."

Buffy turns to him. "Xander, take off your clothes. Now."

Grinning inside, Xander shrugs outwardly as though he has **** and unceremoniously strips down until he's stark naked. Dawn gapes at his penis, and looks back at Buffy. "Buffy, what are you-?"

"You too, Dawn. Get naked. I want to show you how to properly get pleasure from a man."