Nothing to fear, but fear itself
For someone thinning, going sly is the best option. I honestly think it's insanity for anyone to sport a Costanza, birds nest, or comb over vs going sly.
Face your insecurities, shave it off, and be proud of your appearance. Life is too short to waste time fretting about hair - eventually we're all dust.
Enjoy being different, and like the other fellas here, wear the sly look with style and confidence. Don't be afraid of that guy in the mirror. There's only one of you in this world, and your opinion of yourself is the one that matters most. The hell with everyone else
Those that care about you will accept you all the same.