Importantly, rather than promoting aggression, testosterone promotes whatever is needed to maintain status when challenged.

Finish this lecture, go outside, and unexpectedly get gored by an elephant, and you are going to secrete glucocorticoids. There's no way out of it. You cannot psychologically reframe your experience and decide you did not like the shirt, here's an excuse to throw it out - that sort of thing.

To out-group-members, oxytocin makes you crappier - less cooperative and more preemptively aggressive. It's not the luv hormone. It's the in-group parochialism/xenophobia hormone.

What happened during the minutes before? That's the realm of sensory stimuli of the nervous system.

Give lab rats oxytocin and, according to that meme, they get better at talking about their feelings and sing like Joan Baez.

We're getting along so well; I trust you so much for this one second that I'm going to let you yank on me.

If I had to define a major depression in a single sentence, I would describe it as a "genetic/neurochemical disorder requiring a strong environmental trigger whose characteristic manifestation is an inability to appreciate sunsets.