we are a wee bit older than he thinks

okay so i have told stories of my anthropology class and we all get a hoot out of them. well guess what i have another one!!! so were sitting there talking about extended families and he's listing people like cousins and aunts and uncles. then he gets to siblings and he says do you guys know what siblings are. some of are shaking our heads yes others have blank looks on their faces like are you kidding. well there is ALWAYS that one person who has to be a smart alleic so this kid decides to say NO i dont know what siblings are. so guess what our teacher goes into this long spill about them. saying that siblings are our brothers and sisters. and our spouces siblings can also be our siblings. well then he says do you know what spouses are??? well no one answers this time not wanting to hear him go into another long thing. well since NO one answers he tells us what spouses are. i'm just sitting there thinking is this man for real???? or does he tink we are 2 years old again???