'I'm sorry I'm washing my hair' has to be the most overused cliché excuse in British culture to not make an event but you'll be mistaken if you think styling or cleaning your hair doesn't take that much time.
I spend a fair amount of money, and time, on my hair at the salon but when it comes to upkeep at home I absolutely detest it because I know the work I'll have to put in. Who wants to spend hours on end blow-drying, straightening or curling, or de-tangling all those hair strands? Not me.
If I can get away with popping my hair up in a ponytail for the third day running and not having to wash or blow-dry my locks I will. It all sounds incredibly lazy but I am.