everyone lies, whether in the relationship or not, cause human is always being in the state of judgmental, we lies so we can avoid not to being judge by the wrong way, it's actually depends on individual on how big their lies is, if you can keep as clean as possible with out lies then good for you, but not all people are having a great life, that's why lies is needed to gain back their confidences or perhaps ego.

for me i'll won't tell big lies, cause i prefer much to honesty, even if i have big secret i'll wait for the right time to tell, cheers