Jojo walked quietly into my sister's room, watched her undress with her own eyes, wanted to stay with her all night, and was afraid that she would slap me in the face. The answer to this riddle is

Mosquito. I'm afraid I'll slap you, pointing to someone shooting a mosquito to death. Mosquitoes are bloodthirsty, and their attachment to blood has never changed. Mosquitoes also transmit diseases through blood-sucking. Understanding the blood-sucking habits of mosquitoes can reveal their relationship with diseases. Only females suck blood, and males don't. Female mosquitoes must feed on ovaries to develop and reproduce. Female mosquitoes begin to suck blood 2-3 days after emergence. Many factors, such as temperature, humidity and light, will affect the blood-sucking activity of mosquitoes. When the temperature is above 10℃, begin to suck blood; Generally, Aedes mosquitoes mostly suck blood during the day, while Anopheles mosquitoes and Culex pipiens mostly suck blood at night. Some prefer human blood, others like to suck the blood of domestic animals, but there is no strict selectivity, so mosquitoes can spread human and animal diseases. How do mosquitoes bite people? In fact, mosquitoes don't need eyes to bite people at all, but use the carbon dioxide exhaled by people, the sweat smell and heat emitted from the body surface as clues to determine the position of people. On their antennae, there is an organ called "mechanical stimulus receptor". After finding people's position, they will touch people's skin with "mechanical stimulation receptors" and then look for arterioles and venules according to different resistances. At the same time, mosquitoes also have an organ called "chemoreceptor" on their antennae, which can help mosquitoes determine who is rich in cholesterol and vitamin B, which are their favorite nutrients. Who does the mosquito bite? Mosquitoes like carbon dioxide exhaled by animals and are very sensitive to carbon dioxide. Mosquitoes are sensitive to humidity, temperature and sweat, so they often sting people in love sweating. Children's skin is delicate, their metabolism is lively, their pores evaporate sweat quickly, and they are often bitten by mosquitoes. Also, if you wear black, yellow and blue-purple clothes (so wearing white clothes is the first choice), or if the quilt, pajamas or curtains are black, yellow and blue-purple, it is just suitable for mosquitoes' visual habits. But mosquitoes are very sensitive to strong airflow, and it is difficult for mosquitoes to get close to you when you shake the fan to enjoy the cool in summer.