Sexual Responsibilities

Great questions - my first thought is that psychopaths are actually quite rare whereas jerks are very common. A psychopath is one who derives pleasure out of hurting others - the associate you're referring to simply lives in denial and seems to have no respect for his wife, himself, or the values of fidelity and intimacy.

Follow your conscience. Advising his spouse may or may not alter things but it's an act of kindness that she be concerned for her health. I'm guessing if you were in her shoes that you'd want to know. Denial is powerful stuff and even if she doesn't want to acknowledge his behavior she might decide that condoms are a good idea.

To thine own self be true but it never hurts to practice random acts of kindness.