Reply To: Short & Sweet

They say that Rivka Imenu grew up in the house of Lavan, so she was able to see through Esav recognizing who really deserves the brachas.
When Yitzchak Avinu wanted to bentch Esav but he sounded like Yaakov, so why did he bentch him? The Beis Halevi explains that thinking that Yaakov might fool him, Esav made an agreement with Yitzchak that he will speak sounding like Yaakov figuring that Yaakov will speak like Esav but Yaakov did not change his voice.
Originally, Esav came to Yitzchak wearing the hear shirt, from Adam Harishon whicb he acquired from Nimrod, and gave it afterwards to Rivka for safekeeping. Rivka gave it to Yaakov. When Esav returned, he could not find it and went to his father without it, so he smelled like the gehinam.