Esav truly thought he was getting the better part of the deal. He considered that as a hunter, whose life is constantly at risk, it was likely he would die before his father anyway. Therefore, when an opportunity to sell the birthright presented itself he jumped at it and immediately profited from the sale.
We had suffered through an experience I wouldn’t wish on my worst enemy. My wife had to go through labor and deliver our children to their deaths, and I was unable to save them or even give them a little warmth while they died.