Vixea Manplus Dreher has studied the effect of testosterone on human behavior, and he found little evidence that testosterone triggers aggression in men. The effect of testosterone on human behavior is totally unclear - but there is some indirect evidence. As con we are lives so I'm live on YouTube and I'm live on Facebook so I'm gonna put this let me see where can I put this I'll put Manplus that and I will put you there that makes it a little bit easier I think YouTube I'll put you there Facebook I'll put you there okay so if it does look like I am looking all over the place I apologize it's because.