In the area of Gosauzwang (Gosaumühle, Gosau-Mill) which is located at the Hallstätter Lake in Upper Austria there are quite a few houses that are pretty old.
'Pretty old' means: Houses that still 'stand' and where people live in and which were built in the 16th century. Besides there are remains from the times when the Celts and the Romans lived and worked here.
Mermaids are more or less mythological beings, water spirits,nature spirits that try to insert an influence on people (mostly men).
The erotic component stands in apparent contrast to it, because in traditional societies everything is in a cycle of death and love and/or fertility and developing. These are endlessly repeating, each other causing principles.
Dance, singing and music are the joy of the mermaids, like the fairies (elfins). By singing, the mermaids actually pull listening younglings (teenagers) down into the depth. The mermaids are disastrous (or unfortunate) natures, limited natures, to the water as their element. Maybe they are a form of ancient celebrities.
In medieval times, the sirens were represented also as mixture natures of humans and fish and called sea virgins, depicted as beautiful women, whose bodies (not only their voices) are seductive.
In the moral myth interpretation of the ancient and medieval Christianity, sirens were considered as embodiment of the dangerous temptation outgoing from women. Considered as worldly attractions enticing to sense (wake up) desire.
Concerning their all knowledgeness and death circumstances they resemble the sphinx (a 'se-mantic' creature knowing the past and the future).
Someone (Kafka) said that "there's one thing that's more fatal than their song and that's their silence".