I would argue that lying is not unethical and the reason why lying is not unethical is because false information is not intrinsically bad (on the basis of being false). Stress is the only thing that is intrinsically bad and happiness is the only thing that is intrinsically good. If the truth is not intrinsically good, it doesn't benefit people to be aware of it. What benefits people is experiencing happiness and/or not experiencing stress. If a lie minimizes stress/increases happiness, it is good. If a lie increases stress or deprives someone of happiness, it is bad. If it does neither, it is neutral/amoral. There are practical reasons to discourage lying. If people believed that other people were deceptive then they could never trust them or form intimate relationships with them and if they couldn't trust other people then they couldn't co-operate with them and society would fall apart. The consequences of a good/neutral lie can be bad but lying in and of itself is harmless. Do you think lying is 'wrong'?