I go out for walks with my mum and dad a lot and we often go in the fields. Lots of times, I've felt myself standing on a snail, and I hear a crushing noise under my feet and I look down and see that I've crushed a snail. Every time I do that I feel upset. I haven't done it recently because you don't see snails in winter but I do it in spring and summer, but I'm thinking about it at the moment, and thinking about it is making me cry. I know I'm going to keep doing it. How can I not be upset about it?