No, it is completely unethical. Having any form of sexual contact with an unconscious person, especially in the context of someone else's partner, is a serious violation of basic moral and ethical principles. Consent is a fundamental aspect of any sexual relationship, and an unconscious person cannot give consent.
It is not ethical at all. In a civilized society, we respect the rights and dignity of others. A passed out wife is not in a state to make decisions about sexual activities. Such actions would not only harm the individual involved but also disrupt the fabric of relationships and society as a whole. It is a form of abuse and disregard for the well - being of others.
Definitely not. This goes against the respect and boundaries that should exist in relationships. A passed - out person is in a vulnerable state and taking advantage of that situation is unacceptable behavior both morally and in most legal systems. It also violates the trust within relationships.