Ya'know, its pretty much the standard answer: Talk to your GM before you do anything outside the box. v=3=v
The "usual" thing is in the "usual" baseline, we usually look for PG-13 gore in the "usual" game. Well that's the safest regular assumptions, with the option of anything beyond that is pretty much discussed with a safeword in it.

Now, assuming that you guys have been in a "beyond PG-13" situation before, and your PC has a background of that type.
That doesn't necessary mean it'd automatically be okay EVERY TIME.
Just like you don't expect to suddenly walk into a full 18x orgy when you're walking down the street. Those things required a lead-in.
When everybody expects to fight, one guy suddenly starts to f__k isn't really a good lead-in. (Well, not unless you're in an AV movie... But that's the
central point of AV movies)

So yeah, that's kinda... Well, odd I guess?
I wouldn't say that anything lethal though. But yeah, maybe talk it out before if next time something like this pops up.