"What does testosterone and hot girlfriends have to do with firearms?"
@me?
If so, here's what I said:
"A firearm is an extremely dangerous weapon that can- and will- destroy lives. If your nightmare scenario EVER comes true, and she's being assaulted as you come out of the bathroom with your zipper down, then yeah, escalate the force necessary. Otherwise, have a little confidence in yourself, and in your girl, and you'll be fine."
To answer more directly:
"Testosterone"- an oblique reference to machismo, and the inherent tendency for some men to irrationally gravitate towards confrontation- should never be an excuse to brandish "firearms" because someone's "hot girlfriend" got hit on by someone else.