If he prefers a bitter brew and takes his coffee black You my friend had best beware; you ought to watch your back! A scientific survey says that of all people on the street; those who prefer the bitter to the sweet, have psychopathic tendencies revealed by what they eat. If he loves eating Brussel sprouts, but passes on the butter He might be the sadistic type with issues about mother. If he takes his coffee black but eschews the use of sugar. Itβs a good predictive marker that your colleague is meshugah. So pay attention to the habits of your most near and dear, because their choice of what to eat makes their intentions clear.