In a civilized society, we should uphold values like monogamy, respect for others and healthy relationships. Concepts like this are not only unethical but also can be a form of objectifying people and promoting improper behavior.
Ethical values promote respect, privacy and positive human relationships. The idea of 'free cock sharing' in any form is completely contrary to these values and can have a negative impact on individuals and society as a whole. It can also violate laws regarding obscenity and public decency.
Yes, there are huge ethical issues. This kind of concept involves vulgar and inappropriate sexual content which goes against moral and ethical standards in society.