Some of my favorite student comments:

"Will we have to deliver the babies in class?"

"What do you mean there are two in there?"

(upon seeing my "halloween costume") "Your babies dressed up for halloween!"

"Hi Mrs. Anderson" (student then pats belly) "Hi guys!"

"Will you name them after me?"

"Will you name them Zach and Cody?" (A show with twins on the Disney Channel???)

"I bet they are going to be really good musicians since they get to be in music class all day!"

And my favorite:

"Will they be nocturnal?" (He meant fraternal!)