Answer:
Ethical theories have rules/principles that are used to determine right or wrong in any given situation. In this situation will be used Utilitarian, Kant and Natural law theories.
Utilitarians: use to consider the greatest good for all, so is the case to consider if a homosexual relation is beneficial to all involved. Also society judgment should depend on if it had good or bad social consequences. For Kant’s ethics (which is basically based on reason not emotion) the actions are judged in terms of respects for others and should be based on honesty and good intentions. Finally, for Natural law ethics it would be analyzed from whether the practice is consistent with the human nature.