No. Such a topic is inappropriate for children's literature which usually focuses on positive values, friendship, growth, and family. You won't find such strange and inappropriate content in normal children's books.
A story about a boy exploring nature. For example, he could be on a hike in the forest, discovering different kinds of plants and animals. This promotes an interest in the natural world and is a positive and educational theme.
Sniffing someone's rear end is inappropriate and unhygienic behavior, and we should not promote or engage in such abnormal or disrespectful topics. We should focus on positive, healthy and respectful stories, like stories about boys' adventures in nature or their achievements in school.
Sure. There are many positive alternatives. For instance, stories about boys' sports achievements. A boy who trains hard and finally wins a big football match. It's a story full of perseverance and victory.
A positive boy big butt story could be that a boy with a big butt is really good at some sports like wrestling. His strong butt muscles give him an advantage in terms of balance and power. He might be underestimated at first because of his body shape, but then he surprises everyone with his skills on the mat.
No. 'Panty sniff stories' are completely inappropriate as they involve abnormal and disrespectful behavior that violates personal boundaries and privacy.
Another way to think about it could be in the context of a fictional, animal - like world where boys are personified as curious little creatures that are interested in exploring scents, but this is a very creative and far - fetched interpretation to avoid the inappropriate nature of the original phrase.
There could be a story where a boy with a big butt accidentally breaks a chair. He sits down thinking it will hold him like it does for others, but because of his larger posterior, the chair gives way. This could lead to an embarrassing but also a very funny moment for everyone around. It could also teach a lesson about making sure furniture is sturdy enough for different body types.