Ah now Shell, you run two separate baths, yes? We don’t, I usually get first dibs and then when I’m done, Tom uses the same water, but if it’s a little cold for his liking, he’ll top it up with hot. We can spend all evening in the bath between us!!
Depending on the models, I understand that dishwashers can actually save you water over hand washing up! When ours worked, it was only on maybe three times a week. I won’t run a half full machine but then we’d run out of cutlery before the next load was due!!!