Grey Abducter Alien 

Species of extra terrestrial, sterile hybrid species, who collect haploid (eg sperm and ova) samples from a variety of DNA based species in the Milky Way Galaxy. In order to vary their gene pool, as they reproduce by cloning.

The sampling procedure involves placing donors into trance, then beaming themn aboard their crafts, and examining and obtaining samples, then returning said donors.

I read about Gray Aliens from a book called "Communion".

Grey Abducter Alien by Kerb November 27, 2004

Grey Abducter Alien 

A gigantic headed grey skinned Alien. It has extremly large black eyes. They abduct alchoholics, so no one believes there story.
Much like Bill Gates!

" Oh, yeah, last night i WAS abducted!"

Grey Abducter Alien by Scott Methy July 18, 2003