Sue called twice today - once for advice and a second time to tell us that the advice worked so quickly that her negative husband was now laughing! Another caller said, "Write that on your website for us."
Someone who has a negative answer for everything is not often appreciative of your positive answer. They are looking for understanding, not opposition. Your happy positive answer can be more frustrating to him than helpful.
I suggested to Sue to agree with him and show him understanding, not contradict him. First agree with him, then ask him to tell you more about why he is thinking that way. Let him know you want to see his side of the issue he is complaining about. Then, after he has thought through it out loud and you have listened and understand his view, ask him if he sees any hope for a solution - and what that might be.
That way he can become his own problem solver, and you don't have to be a cheerleader for a hopelessly negative person. When he comes up with a possible solution, offer agreement and encouragement to him. If he can't think of a solution yet, invite him to think through the facts; negative people often like to decide based on the facts or details, not your happy feelings. Help them think, then support their solutions.
And then laugh later. Listen to more clean comedies, have fun together and have some happy feelings together at other times of the day. God may have put you together to balance one another for happiness here on earth. Appreciate your differences and help one another grow.