He didn't go behind my back - I asked him to get it done as I'm sick of being the only one to ever do anything resembling a chore with them.
DS1 had thick, wavy reddish brown hair - not really long, but wavy and longish at the front/top.
Ds2 had blond hair that curled at the back - about chin length.
Neither ever had shavers used - just scissor cuts. Both liked their hair. Ex took them to a barber and says he asked for just a trim. Both have come back with very short hair that has been shaved at the back - apparently the barber said 'number 6', but if this is '6' fuck knows what 1-5 are. Never cut their hair by number before. Ex 'didn't realise before it was too late. 
It just doesn't look like them. Very basic very short cuts. Neither likes it - ds1 came in with the hood up on his jacket on what is quite a sunny day. I have said how lovely they look/more grown up etc etc but AIBU to be upset now they're in bed? And will ds2's curls grow back?