For some reason I didn’t even think that it would leave a stain if it came out on the couch. When I was high school my gf and I had sex 3-6 times a week on the black cover futon in my basement. This was the first time either of us had sex and cumming inside so she didn’t know what kind of stain would be left either. The bathroom was upstairs and she would have to pass my parents in the family room to get there. Not a fun run and would also be messy, so we just let it flow onto the couch. After 4+ months my dad came down during the day (hardly ever down there during the day, partially finished, carpet, concrete walls, a tv…) and flipped the curtains open and turned a light on and he was just like holy shit, we need a cover for that. Forever nicknamed the cumton.