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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. 
Hi everyone here that is probably flipping because you want to get rid of your nipple problems.
I went through what you all felt and I would say that there is no solutions without a cost. Surgery would take a few thousand dollars. -yep this is kind of the only effective solution here (well and maybe some remedies that may or may not help).
This is no life threatening problem. It does not affect your health, at all. The only problem that this thing causes is social problem. Having puffy nipples as a teen may really undermine your confidence (by a lot for my case). I would stop doing activities I love such as playing football. I would even have to change the way I walk, wear oversized shirt. Haha I think most of you can relate to this.