Just to be clear, I am by no means a salesman but being an entrepreneur and working as a consultant this is something that I have to grapple with almost daily. I am give good presentations but I am no Steve Jobs at least I don't think I am. Until, I thought about it, I kinda am and so are you. We often have to sell ideas while in the workplace, to the PTO, your kids, your friends and even your spouse. Selling can often be the difference from getting what you want or ending up empty handed.
"If you are not getting what you want out of life maybe you are not selling enough." Sales is a mindset and yeah there are some sleazy tactics out there but if you want to move product (slang for make sales) you gotta sell.