Slice of Chaotic Life

I seem to have been bitten by some creature  with four sharp fangs while I slept. Or perhaps I have impaled myself on a four-teethed fork without noticing, and without poking holes in my clothes. Actually, probably neither of these, but I have no reasonable explanation for these punctures. In normal light the central peak of each puncture is the color of dried blood, which it almost certainly is. Given the limited amount of it, and the absence of pain at any time, I assume the punctures were quite shallow. Therefore I am not going for a tetanus shot.

Anyway, it pleases me that this happens when I have lots of penicillin in the blood anyway, but I am still baffled as to what happened in the first place. I know I am not particularly sensitive to low-level pain (agony is another matter) but seriously, four punctures without noticing anything at all until I happened to see it? Weird.