My wife Donna and I have a pretty good sex life. One of the things we enjoy occasionally doing involves erotic literature.
Sometimes I'll want the evening to be for me. I'll start reading a story out loud, and she'll start "working" on me. Over the course of the story or stories I read, she'll slowly jerk me off, or blow me, or ride me, often in combination. The only rule we have is that until I'm ready to come, she will stop doing whatever she's doing if I stop reading. Once I tell her I'm done, she will finish me off.
And there are nights when she'll want it to be all about here, and the situation is reversed. I'll ultimately get her off; up to that point I'll go down on her, or use my hands and fingers, or I'll pull out her favorite vibrator, whatever I feel like that night. And until she's ready to enjoy her orgasm, I'll stop doing whatever I'm doing if she stops reading aloud.
Until one night recently, her stories had always featured MF couples and their encounters. But on this night, she chose to read a story about a couple who invite a mutual female friend for a threesome, and it was the wife's first time having sex with another woman. I could tell by the way she was reading that she was really into this story.
So this time, rather than doing whatever I wanted to stimulate her, as much as possible I did to her what the female acquaintance in her story was doing to the wife. I couldn't straddle her face and have her eat me, obviously; but other than that, I did my best to help her experience each sensation as the wife in the story experienced it. When she came, it was a pretty intense orgasm.
She never read that story again, never asked me what I thought. And I never said anything or asked her why she read it; if she wanted to talk about it, she'd bring it up. She'd shared something very intimate and special with me, and I wasn't going to risk "breaking the mood".