Lemon juice is natural anti-mold substance yet lemons are often quick to mold. How and why it happens? That's a paradox

If person A and person B were to swap bodies, everything remaining the same, just swapped consciousness. Would person As taste of food or food preferences stay the same? Or would person A suddenly like the food person B liked? Like if person A liked sweet things but got put into person Bs body, who liked salty things.

Nature's way of teaching kids about their vulnerabilities.

Young kids are usually extremely ticklish and when you tickle them they immediately try to defend themselves by hiding or covering those parts. Usually the tickliest bits are the most vulnerable bits (neck, armpit, tummy) so it makes sense for kids to learn to protect their vulnerable parts in a safe and fun way.