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. 
This is a gray area. Testosterone is a schedule III drug and is illegal to obtain without a prescription. The compounding pharmacies and male HRT clinics (also many anti-aging clinics) often have a doctor in-house that will interpret your test results and have a phone consultation with you. That doctor, who you never see in person, will prescribe your testosterone (as well as growth hormone, which is an even grayer area) and any other ancillary drugs ( such as Nolvadex or Arimidex to prevent side effects like gynecomastia ). They usually don’t accept insurance and will ship your HRT drugs out by mail within one week. SO… technically, you’re getting your drugs from a legal pharmacy, which also happens to have a doctor on staff to provide the prescription. I don’t think you’d have anything to worry about in court. The HRT or Anti-Aging clinic, on the other hand, might have some legal questions to answer should the DA or DEA ever decide to pay them a visit, which has happened in the past.
Using an incorrect dosage can have a very negative impact on any patient’s anticipated testosterone cypionate benefits, side effects and uses – as can using the prescribed dosage incorrectly. So there are two critical takeaways for men who are considering the use of TRT; one is to make sure that your doctor is one who is experienced and qualified in prescribing male hormone replacement therapy and the other is to faithfully follow your prescribed dosage instructions. These thins are essential to receiving all of the positive benefits that TRT can give you and none of the negative effects that can result from its improper use. A common example of misuse is missing one of your scheduled injections and then doubling the dose of your next scheduled injection. Knowledgeable TRT doctors will generally advise patients to take their missed injection as soon as possible instead of skipping it and then doubling their next dose. And it is always a good idea to contact your provider directly whenever you have any questions whatsoever about using your prescribed dosage correctly.