Why are space Aliens always naked?

Why are space Aliens always naked? There are different theories. And different Situations. In Betty Hill interviewed after the abduction of her. and her husband Barney Hill in 1961. She said. When they met the space Aliens face to face. They were wearing suits. resembling the astronauts' suits. Even the commander or the leader as she named. was speaking English. but she did not know if he was speaking directly. or whether the communication was by telepathy. In another case. the Italian Giovanna. that special abduction case.She said. i remember little from time to time. i remember the phosphorescent flash emitted from them. and there was astrange substance. covering their skin completely. which are used it as disinfectant. To protect them from infection. when they analyzed this material in the laboratory. they found it is not a normal material. They described it as asilicic substance with mica base. does not contains phosphorus nitrate. and they found phosphorescent marks. on her body. this material has special qualities and contains electrons. that means it si structurlly modified. and it gives a strong magnetic field. this is like accelerating the phosphorus molecules. and this is what Giovanna can't make at home. The aliens painted it on their bodies. The substance protected them from cold and heat. And infection in the exotic environment. which they are in. on the earth. and that such material does not exist. on the earth. they found marks still remained on the body of Giovanna. and her clothes several years after the abduction. Which means that it is a very strong substance. stable and lasting for years. Which means that space creatures. may not affect the fat on this object only once in life. Or even some times during growth. In another case. Said one official. who is said to have met with such creatures face to face. He was initially thought to be naked and not dressed. but when he approached them. They found that they wore very light. transparent suits. or in the color of their bodies as he described it. actually they aren't naked. just the opposite in fact. They look like that because. what they are wearing a kind of hazmat suit type. to protect them from the unusual. and new environment they're in. Is there any reason to believe intelligent aliens. would wear clothing?. After all. of all of the species on earth. we know of only one species that does so. Is the fact that this species happens to also be highly. intelligent the cause of this behaviour or simply coincidental?. Is there perhaps a connection between civilization. and dressing oneself?.