Walked in on Ds in the bath and went "aaaaargh, what have you done to your back!"
Only to be met by bemusement and spinning around by ds to try and see his own back.
It wasn't there this morning, no one has hurt or scratched him. It does not hurt or itch. There are no puncture marks indicating bites.
The only foreign body that has come into contact with his skin is fresh fallen snow when they were shoving it down their collars
. But Ds is not mince so I don't think it's freezer burn.
I am totally baffled.
Ds is praying he will wake up a Zombie

Any ideas?