I'm going to take the question from the perspective of her turning me on, maybe not meaning to.
1. When she talks about her sexual past. My current wife and I married in our 40s, both married previously. We don't share alot about our sexual past, I don't really want her to know about mine and she, likewise, I'm sure. Every so often she gives me a glimpse into it and my imagination runs wild. Probably more than the reality of the things she's done but maybe not.
2. When she dresses sexy not meaning to. She likes to get comfortable, like most, when they get home. Sometimes she looks like she's homeless but sometimes it's a cut up t-shirt with tits hanging out and shorts with a hint of ass cheek showing. A random conversation with the neighbors or an unexpected visitor while she is this way is always a bonus. The quick trip to the store with no bra and her pierced nipples clearly visible is also a treat.
3. Public. The circumstances in which we met required us to have interactions in a public setting. We would fuck in her boyfriend's truck in the parking lot where she worked. It seems to get us both going nowadays. When we go on a trip, I end up fucking her in the window of our hotel room.
