In college my GF loved to give me hickeys (against my will) on my neck before I would go out at the bar because she thought it would dissuade women from flirting with me.
After we had a particularly bad fight, after things cooled down and we were making up, she put a huge one on my neck. Like it looked like someone wrenched me with a baseball bat. Next day it was really bruised and looked horrible. I had to get my DL renewed and they took the pic with the bruise and all.
I got the same thing, bouncers and every time I had to present somewhere would get the "Ohhhhhhh bro, that is BAD!" which would then lead to other people clamoring to see it.
It doesn't really matter. If you are not recognizable, it's not valid. That is the whole point of a photo-ID the photo has to be a good likeness with you. Glad the GP met friendly people that let him get away with it but don't count on it working for ever :-)
The driver's license is not an ID, though. Besides, at least in Germany you get it and then it never changes. So the photo is pretty much always outdated.
My European driver's license expires in 2046, but the fine print says if my appearance substantially changes, or the police requires it, I must get a new one.
Germany is doing away with the eternal drivers licenses in stages. Better look that up before you loose yours. Wifes license runs out in January next year, eep.