Crimes against nature means harming or hurting animals, plants or nature in general. It is like hurting your best friend or your favorite toy. Just like how we need to take care of our pets, we also have to take care of nature because they are all living things just like us. If we harm nature, we may cause a lot of trouble to ourselves, to animals, and to the environment. So we have to be kind to nature and respect it just like we respect our friends and toys. And if someone hurts nature, they may get into big trouble because it is against the law.