What ETs have told me about Mercury

In my 1990 UFO encounter I was informed that extraterrestrials actually live on Mercury and had the chance to meet one. They are apparently able to do so because of a thicker than normal aetheric (< --- not entirely sure how to spell this word) covering of the planet.

Strangely, the inhabitants of Mercury are all human. These humans of Mercury are very timid in nature and generally are underestimated by other races. They feel inferior and unworthy of contact with other human races throughout the solar system but are shy and look away from you when looked at. They are a bit on the stocky side with wide shoulders and they dress in really casual clothes.