Ok, to start I know I am playing with fire starting my thread in this topic, but here I go!
Aibu in thinking my DP is being a knob by refusing to skip his gym sessions when they fall on Christmas day and boxing day?
He is adamant he is going, even though I want him to be at home with me and the DD's for those days, just having the days off to enjoy our family, good food and drink. 
So I will be alone with me and the dd's, and they will be asking where he is going and I will have to explain to them, And my eldest dd is old enough to question it and ask why he is going out and not staying at home with us. 