eh, I don't know. I think testosterone does alter feelings and behavior in fairly shocking ways, far beyond what you see when you dress differently. Do you remember puberty? I went through puberty later than most of my peers, as far as I can tell (I didn't get shoulders until I was well out of high school, and the shoulders corresponded with developing a sex drive and other feelings one associates with puberty. Now, I don't know if it was a coincidence or not, but this was also around the time that I started eating meat.)
And yeah, the aggression was pretty shocking at first. I can remember feeling like the hulk. "my god, I'm huge!" I'd break things by accident because I was stronger than I expected. by that time, I considered myself an adult with a job and I was surrounded by people who were forty plus years old, so I didn't actually pick fights with people, but I'd be lying if I said I didn't want to.
As far as I can tell, this isn't particularly unusual for young men (except, maybe, for the timing)