Keep it clean.
THE CLASSIC question that a guy, at least, should never, answer: It's a trap!! Just head for the hills. ;)
"Does this make me look fat?"
"No, honey, you look fine." - That means you didn't answer honestly; you're just trying to pacify.
"Well, [insert honest, constructive criticism]." - We all know how that ends.
"Do you love me?" (On the second date)
"What should we name the children?" (On the first date)
Donna, that is too funny! You could make a whole comedy TV show from this topic, and especially those two questions!