Water based or Aqueous testosterone suspension can peak in the blood stream within minutes of being injected and is metabolized very fast. Because Testosterone Suspension remains in the body for a short time, it has to be injected very frequently. In most cases Testosterone Suspension has to be administered daily or few times a day in order to maintain a stable blood testosterone level. If Testosterone Suspension is your preferred choice you can rotate injection spots each time rather than injecting the same location each day. This form of testosterone is not highly recommended and is often used by very experienced and extreme athletes, body builders and power-lifters. This testosterone form give the best strength results and a high aggressiveness. It also exist a testosterone with no ester and oil based called TNE (Testosterone No Ester).
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.