It sounds like a creature from Jurassic World, but this plant is worth learning to pronounce, especially if you haven’t had great sex since dinosaurs roamed the earth. A 2012 study showed that consuming six grams of tribulus root for 60 days improved erections and frequency of sex in men with low sperm counts. It also reduced sexual fatigue . Furthermore, their testosterone jumped by a whopping 16%. “Trib,” as it’s called, is thorny and bitter, so look to a supplement for consuming it. Epiq’s Quad Test includes Tribulus terrestris. ( )
Testosterone is significantly correlated with aggression and competitive behaviour and is directly facilitated by the latter. There are two theories on the role of testosterone in aggression and competition.  The first one is the challenge hypothesis which states that testosterone would increase during puberty thus facilitating reproductive and competitive behaviour which would include aggression.  Thus it is the challenge of competition among males of the species that facilitates aggression and violence.  Studies conducted have found direct correlation between testosterone and dominance especially among the most violent criminals in prison who had the highest testosterone levels.  The same research also found fathers (those outside competitive environments) had the lowest testosterone levels compared to other males. 
Tribulus works by stimulating the anterior pituitary to produce Leutinizing Hormone. Tribulus is a first choice addition to many testosterone boosting formulas because it could keep natural levels testosterone not having any negative effects on its long term production. It is a well-documented risk to introduce exogenous hormonal substances (like steroids) that shut down the endogenous production of testosterone. As the use of these products tapers down, it is essential that the endogenous production kicks back in as soon as possible because normal levels of these hormones are needed to maintain much of the gains made while taking them., therefore tribulus becomes a valuable addition to any hormone boosting stack.