I've always had to come up with excuses.
"Why were you out so late?"
"I was at Willow's house, studying." I was in the cemetery, patrolling.
"I didn't hear you come in last night."
"I was quiet." I didn't.
"Why don't you have your homework done?"
"I forgot." I was too busy saving the world.
"Where are you going?"
"The Bronze." Patrolling.
So, now, if they ask, Dawnie can tell them my excuse for me.
"Why did Buffy jump into that portal?"
"To save her sister and the world." To sleep.