can't do that

One day a little boy was outside in the backyard stomping on honeybees.
When his father came out, he made him stop right away and told the little boy, "That's it for you. No honey for a week."
A few minutes later the father sees the boy in the front yard stomping on butterflies. The fater says "Stomping on butterflies is a terrible thing to do. Just for that, no butter for a week."
After that, they both go in the kitchen and they see the little boy's mother stomping on cockroaches.
The boy turned to his father and said, "Should I tell her or should you?"