Use me.

"It's not on my list, exactly..." Sarah smiled sheepishly. "But I had a thought."

"Yeah?" Zack was curious.

"Yeah. You know, you've been so good to me. All the years, through everything, you've been completely supportive. I mean it when I say that I'd be dead without you. Zack, I owe you everything." She reached out and held his hand.

He blushed. "I don't know, I guess I do my best. I love you so much and I want you to be happy."

She laughed and lightly punched his shoulder. "Don't be modest! You're amazing! Even at my lowest point I always knew I could count on you. You've given me more than I even knew to ask for. And that's why my other idea isn't on my list. I want to know what's on yours."

Zack was a little surprised. "Sarah, we already did that. You, uh, gave me that blowjob. We showered together."

"Yeah, but those were as much for me as for you. I wanted to try new things. I wanted to see what it felt like. Now I'm talking about something just for you. Think about it, Zack. When was the last time you did something purely selfish? Now's your chance! Don't worry about what I want or what I think. You could poke me in the eye like the three stooges or insult me or tell my mom I blew you and none of it would bother me at all! So what's something really selfish you want?"

Zack blushed as he tried to think of something. On impulse, Sarah leaned in and gave him a deep kiss. Breaking away, she smiled apologetically. "Sorry, you're so cute when you're embarrassed. I couldn't help myself!" She winked. "Now what kind of dirty depraved thing do you want to do to me?"

Zack finally came up with something. He wasn't sure how to communicate it, though. "I always thought it would be hot if you, um, cleaned the house nude."

Sarah drew back in shock. "What? That's so fucked up! How dare you? I'm not just some object for you to-" her face broke as she started laughing. "Sorry, I couldn't keep a straight face. You should have seen your face! Of course I'll do it, that sounds delightful!"

He fumed. "Not funny. You can be a real asshole, you know that?"

She was already stripping out of her clothes. As she tossed her skirt onto the floor, she replied in a sing-songy voice, "I knoowww..."