Bruise

I woke up today with a strange blue strain on the forefinger of my left hand. Last night was not wild at all. We ate, we drank and we smoked. A grown-up dinner, corresponding to my age.
Nevertheless the provenance of this strain remains obscure.
I feel like back in my early twenties when normal waking up with bruises, bumps, scrapes and bloody sores after a good weekend.
But now? I might have beaten someone. I do not know. And probably shall never know.