Motion sickness is a very common reason. When a girl is in a moving vehicle like a car, boat or plane and her inner ear gets disrupted, it can make her feel sick and she may end up puking. Another factor could be pregnancy, but that's more relevant for adult women. For a girl, it's more likely to be one of the other reasons like overeating or having an allergic reaction to something she ate.
There was this girl who had a stomach bug. She was at school in the middle of a class. She started to feel queasy and tried to hold it back. But it was no use. She puked all over her desk. The teacher was very understanding. She quickly sent another student to get the janitor while she took the girl to the nurse's office. The girl was really embarrassed, but everyone was very kind to her.
I have no idea. Such a topic is inappropriate and may not have a valid or positive reason behind it.
Maybe it's trying to show the negative effects of excessive drinking in a humorous or exaggerated way.
I think it's because such manga might offer a unique or extreme form of expression that attracts certain individuals with specific interests.
It might be part of a broader story or theme where puking is used symbolically or as a plot device. Or maybe the creator just had a weird idea and went with it.
Maybe it ate something bad that made it sick and caused puking.
Maybe the dog ate something bad. That could be why it's puking.
Maybe it ate something bad or got sick. That could be the reason for it to puke.
One new puking story could be about a child who ate too much cotton candy at a fair and ended up puking. Another might be a person who got seasick on a boat ride and puked over the side. There could also be a story of someone who had a bad reaction to a new food and puked it out.
Well, there are a few possibilities. Maybe the cartoon shows the cat puking because of stress, an allergic reaction, or even a digestive problem.