I'm not sure specifically what this 'black cat pee desperation story' is. It could potentially be a story about a situation where a black cat is in a desperate state related to urination, perhaps it's having trouble finding a suitable place to pee, or there's some urgency due to a health issue or being trapped in a certain area.
I don't have a specific 'black widow pee desperation story' on hand. However, generally, such a story could involve a black widow spider being in a situation where it's desperate to find a suitable place to excrete waste. Maybe it's trapped in a small, enclosed space and is constantly searching for an area away from its web or hiding place to relieve itself, constantly moving around in agitation.
One plot for such a story could be that a black widow lives in a basement. A flood suddenly occurs, and the water is rising. The black widow is not only worried about surviving the flood but also has the need to pee. The rising water is contaminating its normal pee area, and it has to struggle to find a new, dry and safe place to relieve itself. This struggle and the growing desperation could be the main focus of the story as it tries to adapt to the changing and dangerous situation.
Once, during a long exam at school, my friend had drunk a lot of water before. As the time passed, he really needed to pee desperately. But the teacher was strict and wouldn't let anyone leave the classroom during the exam. He squirmed in his seat until the end of the exam and then rushed to the bathroom.
There was this time at a concert. I was so excited about the show that I forgot to use the restroom before it started. The concert was amazing, but halfway through, I started to feel the pee desperation. I was in the middle of a huge crowd, and it was really difficult to get out. I had to keep crossing my legs and bouncing a bit. Eventually, I managed to push my way through and made it to the bathroom.
There was a girl at a concert. She drank a lot of soda before it started. As the concert went on, she started to feel the need to pee desperately. The crowd was so thick that she could hardly move. She tried to focus on the music to forget about it but it didn't work. She had to push through the people, saying 'excuse me' over and over again until she reached the restrooms at the back of the venue.
A 'pee desperation fanfic' is a type of fan - created fictional work that often focuses on the theme of a character experiencing extreme urgency to urinate. It might be part of a niche genre within fanfiction communities, but it's not very common in mainstream literature.
Once in my school, there was a student who was so focused on an exam that he ignored his need to pee. As the time passed, his desperation grew. Eventually, he couldn't hold it any longer and had a small accident right in his seat. It was really embarrassing for him, but the teacher was understanding and quickly helped him clean up without making a big fuss.
Yes, they can be common. Many situations like being in a long line, in a vehicle during traffic, or at an event where leaving briefly is inconvenient can lead to such situations for girls. It's a normal part of life experiences.