The day my cousin made me into this kink
When i was younger [M18], i was travelling with my grandma and my cousin [F18], who was very close to me. We were travelling by car and, while passing through a remote region, my cousin asked if we could stop in the next bathroom. It took some time until we got to an isolated gas station with an adjacent bathroom. So my grandma stopped the car and me and my cousin got out, i was taking the opportunity to stretch.
I noticed the mans bathroom was closed but didnt care too much and decided to just wait my cousin. After she entered there, she messaged me saying that there were only 2 toilets and both were "under maintenance", i asked what she was going to do and if she wanted to try to go to the next place, then she answers me just with an "wait".
She took a long time after that and i messaged her if everything was fine, after a bit more she responds telling me she did something and sent me a pic of a big pile of shit inside one of the sinks in the bathroom, with a bit of cash on the side. She started laughing in the messages and telling me she couldnt wait more but left an tip in there for the cleaner, she also asked me to not say anything to grandma. She probably thought the photo grossed me out but she doesnt know i kept it with me for a while. I think that really influenced me to have this kink.
*i dont have the pic rn bc that was many years ago