Some years ago I had a married lover, a nurse who could escape from her husband and spend a couple of days at my house from time to time. Her excuses were "nurse conventions" (and it wasn't a total lie, because we did an exhaustive exam of the human body). We mostly did conventional things like take showers togheter, doctor's role play or foot fetish, nothing special.

But one of those days we were drinking a coffee while she was telling me futile things about her life, when suddenly she went to the bathroom and close the door, but she didn't stop talking. I stayed behind the bathroom door trying to hear her words and finally said "Please speak louder". However, she simply open the door and I saw her sitting on the toilet. "Sorry, you're pooping" I said while, don't know why, I experienced a huge erection. I stayed next to her.

She kept talking naturally, but I clearly heard a fart and, immediatly, the sound of the poop falling on the water. The smell didn't disturbe me. A couple of minutes later, she finished and took the toilet paper to clean her ass, but I said "Please, don't" and pulled out my cock from my pants. She understood and began to suck it till I cum in a few seconds: just think about her dirty ass completely turned me on. Finally, we took a shower laughing about that bizarre situation.

Some weeks later she came to my house again, and we tried to repeat the experience, but now I found the situation disgusting. Nothing happened. At the present time, I remember that day and don't feel any pleasure, just the opposite. I know poop fetish is another thing and very extreme sometimes, and I saw scat videos (specially the extreme Brazilian MFX), trying to feel some motivation again, but no way. I guess I'll never know what happened that day, and probably (not surely) won`t happen again. Even very softcore, a different experience anyway.