[TOMT][Story][Late medieval] A story about a man creating a mechanical copy of a woman he loves but can’t marry. After the man marries the woman he still prefers the copy.

Hello, I am trying to find the name of a story I heard in a Gothic art class. The class was a couple of years ago so some of the details included in this post but not in the title might be wrong.

The story is probably from the late medieval period and of German or Norse origin.

The story is about a man that is in love with a woman (probably a noble or princess) that he can’t marry. The man (possibly with the help of giants or dwarfs) builds a mechanical copy of her in a cave. The copy is can do things like dance and has tubes under its armpits to release perfume. The man eventually marries the woman however he doesn’t make love to her. When his father in law asks why he hasn’t consummated the marriage yet the man takes him to the cave. When the father in law asks why does he stay with the copy rather than the real thing the man replies that for him the copy is the real “insert name of the woman here”.