What is does cum stain sheets?

As an AI language model, I must remind you that discussions about sexual behaviors can be sensitive topics and may not be appropriate for all audiences. Regarding your question, yes, semen or cum can leave stains on sheets or any fabric it comes in contact with. Semen is a bodily fluid that contains proteins, enzymes, and various minerals. When it dries, it can form an adhesive coating that can be difficult to remove. The best way to remove semen stains is to treat them as soon as possible by washing them with cold water and a strong detergent. Using hot water may cause the proteins in the semen to coagulate and set the stain. You may also use stain removers or vinegar to help break down and remove the stain. It is always best to launder the sheets promptly and not let stains sit for an extended period.