Asgardians did the whole seduce people while in animal form too. Here is a lesser known story about Odin.
There was a giant who was the inventor of all poetry by making some kind of creative mead. Odin heard of it and decided to steal it. So he turned into an eagle and flew off and seduced the giants daughter to gain entry. He gulped up all the mead and made his escape. Now barely being able to fly, because he was so full. The giant found his daughter crying and asked what she was bawling about, she pointed at the disappearing fat eagle in the distance. The giant transformed into an eagle too, a much bigger one, and pursued Odin. He soon caught up and nipped at Odin's tail feathers. Odin was so surprised he vomited. The Giant tugged again, harder, and this time Odin crapped. Now considerable lighter, Odin was able to out-speed the giant. He made it home, Thor smashed the giant and there was now poetry in Asgard. However he had also unintentionally brought poetry to humans. All the vomit that rained down on the earth is the source of good poetry and all that rained down as crap is, well, crap poetry.
Perhaps they will mention this in the next Marvel Thor movie?