AnimalsJokes The Teacher Was Discussing Insects In Her Biology Class. This Will Blow Your Mind. 5k Views The science teacher was discussing insects in her biology class for the kids. She said, “moths always fly with their legs apart. Can anybody tell me why?” Many of the students looked at each other in total confusion. Then little Johnny raised his hand. When called upon — after some hesitation — he said, “Miss, you have ever seen the size of moth b@lls?” See more Previous joke A Rat Swallowed A Diamond. Next joke The Dog Could Hardly Hear.