What’s funny is that the Dutch filmmaker wrote it about a German:
“The film concerns a deranged German surgeon who kidnaps three tourists and conjoins them surgically…”
https://en.m.wikipedia.org/wiki/The_Human_Centipede_(First_Sequence)
Yes, obviously, as Germany was traditionally the setting of Gothic horror novels, such as Frankenstein by Mary Shelley. Maybe the author was just doffing his hat to this tradition, or he was critical of the censorship of horror films in Germany, or whatever.
I have never seen this film, however, and I definitely wouldn’t want to 😱