Reduce stress.
Feel confidence.
Increase sexual pleasure.
Go from anger to forgiveness.
Ask for what you want.

Yes, we also think it can.........  (Add a bunch more.)  we think telling the truth and getting honest can improve most areas of life (eventually). Lying and misdirection, fear of uncomfortable or intense sensations in the body lie at the root of how we make our lives miserable. 

If you're tired of affirmations, letter burnings, positivity gurus who pretend to have it all together, and just about all the various forms of dealing with ourselves, simply being honest with each other may be good for you.