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. 
There have been stories the DEA/FDA may frown upon the dispensing of testosterone propionate instead of testosterone cypionate or enanthate by physicians. The reason given: “it is used more often for performance optimization like growth hormone (GH) and is a red flag”. There are numerous physicians prescribing testosterone propionate in their practices without issue. This may warrant further monitoring for any doctor using testosterone propionate. In my book, I recommend 30-50 mg of Testosterone Propionate injected every other day (EOD) as an excellent option for long term TRT administration.
A Testosterone Propionate cycle during a cutting phase is an excellent way to ensure muscle mass isn’t lost during a diet. You will also find it enhances fat loss efficiency and produces a stronger more defined look. As with the off-season Testosterone Propionate cycle, the total stack and doses may need to be adjusted in order to meet your needs; again, this is a sample guide. It is also important you consult with your doctor to ensure you’re healthy enough for use. Important Note – This type of Testosterone Propionate cycle will not produce less or more water retention compared to plans that might contain Testosterone Cypionate or Testosterone Enanthate in the Propionate versions place. It’s often assumed by many steroid users that Testosterone Propionate will yield less water retention than the aforementioned versions but that’s a myth. Testosterone is testosterone and does not become active in the body until the ester has been removed. The reason many believe it leads to less water retention is a very simple one; most given extra attention to their diet and estrogen control during a cutting phase, and this will always lead to less water retention in a Testosterone Propionate cycle or any cycle.