The significance of the silver comic vine could vary depending on the context. It could be a rare and valuable item, or it could have some sort of magical or special power that affects the plot.
Absolutely not appropriate. Sex naked scenes on a train in a cartoon are not only inappropriate but also potentially harmful as they can distort values and perceptions. Such content should be strictly avoided.
Loli comics typically have sweet and gentle themes. They might feature magical adventures or school life scenarios. The characters' expressions and interactions are key elements that draw readers in.