I don't know if it was only the guys I knew, or if it's all of us and we just haven't realized. I don't think I'd know even with serious introspection.
There's something in us that is just. Ugly. Where, if we don't get what we want, we'll feel the need to hurt that other person. Claws out and words specifically uttered with the intention of wounding. I can't say I've felt it, but it's been a really long time since I badly wanted something of someone.
Of course, I could just be spouting shit. But sometimes I don't think we realize what other people can see from the things that we say.