Sexual imprinting on inanimate objects is a popular theory concerning the development of sexual fetishism. For example, according to this theory, imprinting on shoes or boots (as with Konrad Lorenz's geese) would be the cause of shoe fetishism.
BRAND NAME: Gardasil. DRUG CLASS AND MECHANISM: Gardasil is a human papillomavirus (HPV) vaccine. Gardasil is a sterile preparation for intramuscular injection and contains purified inactive proteins from HPV types 6, 11, 16, and 18.
While Yggdrasil is not mentioned by name in the poem and other trees exist in Norse mythology, the tree is near universally accepted as Yggdrasil, and if the tree is Yggdrasil, then the name Yggdrasil directly relates to this story.