I believe NOT!
Selling is sometimes looked upon as a dark art, something that other people are good at or it is hoped marketing will bring in more sales. Most business owners I know are great at what they do - but lack the ability to 'sell' themselves, thier business or products. They believe someone like me is a natural born salesman. Not true I tell them, I was a shy kid and scared of the dark - so what changed.
Anyone can sell - we have all sold something. Everyone married has given at least one great sales pitch that someone has bought!
One thing we must have to sell effectively is passion. Enthusiasm will give you in spades what you lack in ability. I have never sold anything I didn't believe in passionately. When you come to speak about your products, the propsect must be able to pick up on your passion. Once you feel this passion -- your halfway there. The next step is influencing the prospect into believing you are the answer to their prayers. Seling AND influencing will bring you so much more business, win more clients and get those referrals coming in.