Tryvexan That is a HUGE amount of calories to have to take, especially because knocking down 2 of these in an evening is tantamount to munching a big mac and trying to feel sexy. One of the best things about Fever is the cool packaging it comes in. These substances are responsible for the stimulant and tonic action of the plant. Certain foods that looked like a phallic symbol were said to enhance male sexuality. The sole major difference in this is that it uses elastic bands or cables in place of the weight loads in the first work out.